Centralized settings management

2024-12-22 04:40:20 +01:00 · 2017-11-07 00:36:44 +01:00 · 2017-11-07 00:36:44 +01:00 · 2193313980
commit 2193313980
parent 18df3f97fe
24 changed files with 917 additions and 912 deletions
--- a/.eslintrc.json
+++ b/.eslintrc.json
@ -13,8 +13,7 @@
    },
    "extends": "eslint:recommended",
    "globals": {
-        "exportFunction": false,
-        "settings": false
+        "exportFunction": false
    },
    "rules": {
        "brace-style": ["error", "stroustrup", {"allowSingleLine": true}],
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@ -53,6 +53,31 @@
 			},
 			"problemMatcher": []
 		},
+		{
+			"taskName": "run current",
+			"type": "shell",
+			"windows": {
+				"command": "web-ext"
+			},
+			"linux": {
+				"command": "web-ext"
+			},
+			"osx": {
+				"command": "web-ext"
+			},
+			"args": [
+				"run",
+				"--url",
+				"http://canvasblocker.local/test/"
+			],
+			"presentation": {
+				"echo": true,
+				"reveal": "always",
+				"focus": false,
+				"panel": "shared"
+			},
+			"problemMatcher": []
+		},
 		{
 			"taskName": "build",
 			"type": "shell",
--- a/_locales/de/messages.json
+++ b/_locales/de/messages.json
@ -91,39 +91,39 @@
 		"message": "",
 		"description": ""
 	},
-	"blockMode_options.allow everything": {
+	"blockMode_options.allowEverything": {
 		"message": "alles erlauben",
 		"description": ""
 	},
-	"blockMode_options.allow only white list": {
+	"blockMode_options.block": {
 		"message": "nur Einträge der Whitelist erlauben",
 		"description": ""
 	},
-	"blockMode_options.ask for permission": {
+	"blockMode_options.ask": {
 		"message": "um Erlaubnis fragen",
 		"description": ""
 	},
-	"blockMode_options.ask for readout API permission": {
+	"blockMode_options.askReadout": {
 		"message": "bei Auslese-API um Erlaubnis fragen",
 		"description": ""
 	},
-	"blockMode_options.block everything": {
+	"blockMode_options.blockEverything": {
 		"message": "alles blockieren",
 		"description": ""
 	},
-	"blockMode_options.block only black list": {
+	"blockMode_options.allow": {
 		"message": "nur Einträge der Blacklist blockieren",
 		"description": ""
 	},
-	"blockMode_options.block readout API": {
+	"blockMode_options.blockReadout": {
 		"message": "Auslese-API blockieren",
 		"description": ""
 	},
-	"blockMode_options.fake readout API": {
+	"blockMode_options.fakeReadout": {
 		"message": "Auslese-API vortäuschen",
 		"description": ""
 	},
-	"blockMode_options.fake input API": {
+	"blockMode_options.fakeInput": {
 		"message": "Bei Ausgabe vortäuschen",
 		"description": ""
 	},
@ -162,7 +162,7 @@
 		"message": "konstant",
 		"description": ""
 	},
-	"rng_options.non persistent": {
+	"rng_options.nonPersistent": {
 		"message": "nicht persistent",
 		"description": ""
 	},
@ -185,7 +185,7 @@
 		"description": ""
 	},
 	"storePersistentRnd_description": {
-		"message": "Ob Daten für den persistenten Zufallszahlengenerator gespeichert werden sollen.",
+		"message": "Ob Daten für den persistenten Zufallszahlengenerator gespeichert werden sollen. Ansonsten werden die Daten beim Beenden des Browsers verworfen.",
 		"description": ""
 	},
 	
@ -390,27 +390,27 @@
 		"message": "Für eine Fehlersuche ist eine detaillierte Aufzeichnung der Addon-Aktivitäten hilfreich. Mit diesem Parameter kann der Grad der Detailliertheit dieser Aufzeichnung eingestellt werden.",
 		"description": ""
 	},
-	"logLevel_options.none": {
+	"logLevel_options.0": {
 		"message": "nichts",
 		"description": ""
 	},
-	"logLevel_options.error": {
+	"logLevel_options.1": {
 		"message": "Fehler",
 		"description": ""
 	},
-	"logLevel_options.warning": {
+	"logLevel_options.25": {
 		"message": "Warnungen",
 		"description": ""
 	},
-	"logLevel_options.message": {
+	"logLevel_options.50": {
 		"message": "Nachrichten",
 		"description": ""
 	},
-	"logLevel_options.notice": {
+	"logLevel_options.75": {
 		"message": "Notizen",
 		"description": ""
 	},
-	"logLevel_options.verbose": {
+	"logLevel_options.100": {
 		"message": "ausführlich",
 		"description": ""
 	}
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@ -91,39 +91,39 @@
 		"message": "",
 		"description": ""
 	},
-	"blockMode_options.allow everything": {
+	"blockMode_options.allowEverything": {
 		"message": "allow everything",
 		"description": ""
 	},
-	"blockMode_options.allow only white list": {
+	"blockMode_options.block": {
 		"message": "allow only white list",
 		"description": ""
 	},
-	"blockMode_options.ask for permission": {
+	"blockMode_options.ask": {
 		"message": "ask for permission",
 		"description": ""
 	},
-	"blockMode_options.ask for readout API permission": {
+	"blockMode_options.askReadout": {
 		"message": "ask for readout API permission",
 		"description": ""
 	},
-	"blockMode_options.block everything": {
+	"blockMode_options.blockEverything": {
 		"message": "block everything",
 		"description": ""
 	},
-	"blockMode_options.block only black list": {
+	"blockMode_options.allow": {
 		"message": "block only black list",
 		"description": ""
 	},
-	"blockMode_options.block readout API": {
+	"blockMode_options.blockReadout": {
 		"message": "block readout API",
 		"description": ""
 	},
-	"blockMode_options.fake readout API": {
+	"blockMode_options.fakeReadout": {
 		"message": "fake readout API",
 		"description": ""
 	},
-	"blockMode_options.fake input API": {
+	"blockMode_options.fakeInput": {
 		"message": "fake at input",
 		"description": ""
 	},
@ -162,7 +162,7 @@
 		"message": "constant",
 		"description": ""
 	},
-	"rng_options.non persistent": {
+	"rng_options.nonPersistent": {
 		"message": "non persistent",
 		"description": ""
 	},
@ -185,7 +185,7 @@
 		"description": ""
 	},
 	"storePersistentRnd_description": {
-		"message": "If data for the persistent random number generator should be stored.",
+		"message": "If data for the persistent random number generator should be stored. Otherwise it is discarded on browser shutdown.",
 		"description": ""
 	},
 	
@ -394,27 +394,27 @@
 		"message": "To find the cause for an error a detailed logging of the addon activities is helpful. This parameter controls the level of detail of the logging.",
 		"description": ""
 	},
-	"logLevel_options.none": {
+	"logLevel_options.0": {
 		"message": "none",
 		"description": ""
 	},
-	"logLevel_options.error": {
+	"logLevel_options.1": {
 		"message": "error",
 		"description": ""
 	},
-	"logLevel_options.warning": {
+	"logLevel_options.25": {
 		"message": "warning",
 		"description": ""
 	},
-	"logLevel_options.message": {
+	"logLevel_options.50": {
 		"message": "message",
 		"description": ""
 	},
-	"logLevel_options.notice": {
+	"logLevel_options.75": {
 		"message": "notice",
 		"description": ""
 	},
-	"logLevel_options.verbose": {
+	"logLevel_options.100": {
 		"message": "verbose",
 		"description": ""
 	}
--- a/lib/callingStack.js
+++ b/lib/callingStack.js
@ -12,6 +12,8 @@
 		window.scope.callingStack = {};
 		scope = window.scope.callingStack;
 	}
+
+	const settings = require("./settings");
 	
 	// Translation
 	var _ = function(name, replace, translateAPI){
--- a/lib/check.js
+++ b/lib/check.js
@ -13,6 +13,7 @@
 		scope = window.scope.check;
 	}
 	
+	const settings = require("./settings");
 	const lists = require("./lists");
 	const {parseErrorStack} = require("./callingStack");
 	const logging = require("./logging");
--- a/lib/defaultSettings.js
+++ b/lib/defaultSettings.js
@ -1,26 +0,0 @@
-const settings = {
-	logLevel: 1,
-	whiteList: "",
-	blackList: "",
-	blockMode: "fakeReadout",
-	minFakeSize: 1,
-	maxFakeSize: 0,
-	rng: "nonPersistent",
-	useCanvasCache: true,
-	ignoreFrequentColors: 0,
-	fakeAlphaChannel: false,
-	persistentRndStorage: "",
-	storePersistentRnd: false,
-	askOnlyOnce: true,
-	showNotifications: true,
-	storeImageForInspection: false,
-	ignoreList: "",
-	showCallingFile: false,
-	showCompleteCallingStack: false,
-	enableStackList: false,
-	stackList: "",
-	displayAdvancedSettings: false,
-
-	// indicator if the real settings are loaded already
-	isStillDefault: true
-};
--- a/lib/frame.js
+++ b/lib/frame.js
@ -4,6 +4,7 @@
 (function(){
 	"use strict";
 	
+	const settings = require("./settings");
 	const {intercept} = require("./intercept.js");
 	const {ask} = require("./askForPermission.js");
 	const lists = require("./lists.js");
@ -46,6 +47,7 @@
 	var port = browser.runtime.connect();
 	var tabId;
 	port.onMessage.addListener(function(data){
+		message("Got data from port", data);
 		if (data.hasOwnProperty("tabId")){
 			notice("my tab id is", data.tabId);
 			tabId = data.tabId;
@ -64,8 +66,6 @@
 				settings[key] = data.settings[key];
 			});
 			settings.isStillDefault = false;
-			logging.clearQueue();
-			lists.updateAll();
 		}
 	});
 	var notifications = [];
@ -141,22 +141,9 @@
 		return true;
 	}
 	
-	if (settings.isStillDefault){
-		message("load settings");
-		browser.storage.local.get().then(function(data){
-			Object.keys(data).forEach(function(key){
-				notice("loaded setting:", key, ":", data[key]);
-				settings[key] = data[key];
-			});
-			settings.isStillDefault = false;
-			logging.clearQueue();
-			lists.updateAll();
-			interceptWindow(window);
-		});
-	}
-	else {
+	settings.onloaded(function(){
 		interceptWindow(window);
-	}
+	});
 	
 	message("register listener for messages from background script");
 	browser.runtime.onMessage.addListener(function(data){
@ -175,15 +162,4 @@
 			notice("notifications sent");
 		}
 	});
-	
-	
-	message("register listener for settings changes");
-	browser.storage.onChanged.addListener(function(change, area){
-		if (area === "local"){
-			Object.keys(change).forEach(function(key){
-				notice("setting changed:", key, ":", change[key].newValue);
-				settings[key] = change[key].newValue;
-			});
-		}
-	});
 }());
--- a/lib/intercept.js
+++ b/lib/intercept.js
@ -16,6 +16,7 @@
 	const {changedFunctions, setRandomSupply} = require("./modifiedAPI");
 	const randomSupplies = require("./randomSupplies");
 	const getWrapped = require("sdk/getWrapped");
+	const logging = require("./logging");

 	setRandomSupply(randomSupplies.nonPersistent);
 	var apiNames = Object.keys(changedFunctions);
@ -57,6 +58,7 @@
 	
 	scope.intercept = function intercept({subject: window}, {check, checkStack, ask, notify, prefs}){
 		var siteStatus = check({url: getURL(window)});
+		logging.verbose("status for page", window, siteStatus);
 		if (siteStatus.mode !== "allow"){
 			apiNames.forEach(function(name){
 				var changedFunction = changedFunctions[name];
--- a/lib/lists.js
+++ b/lib/lists.js
@ -15,8 +15,7 @@
 		scope = window.scope.lists;
 	}
 	
-	var preferences = require("sdk/simple-prefs");
-	var prefs = preferences.prefs;
+	var settings = require("./settings");
 	
 	
 	function getDomainRegExpList(domainList){
@ -66,15 +65,15 @@

 	function updateList(type, value){
 		if (typeof value === "undefined"){
-			value = prefs[type + "List"];
+			value = settings[type + "List"];
 		}
 		lists[type] = getDomainRegExpList(value);
 	}
 	Object.keys(lists).forEach(function(type){
-		preferences.on(type + "List", function(value){
-			updateList(type, value);
+		settings.on(type + "List", function({newValue}){
+			updateList(type, newValue);
 		});
-		updateList(type, prefs[type + "List"]);
+		updateList(type, settings[type + "List"]);
 	});

 	function updateStackList(value){
@ -99,19 +98,16 @@
 		lists.stack = list;
 	}
 	lists.stack = [];
-	preferences.on("stackList", function(value){
-		updateStackList(value);
+	settings.on("stackList", function({newValue}){
+		updateStackList(newValue);
 	});
-	updateStackList(prefs.stackList);
+	updateStackList(settings.stackList);

 	scope.get = function getList(type){
 		return lists[type];
 	};
 	scope.appendTo = function appendToList(type, entry){
-		prefs[type + "List"] += (prefs[type + "List"]? ",": "") + entry;
-		var obj = {};
-		obj[type + "List"] = prefs[type + "List"];
-		browser.storage.local.set(obj);
+		settings[type + "List"] += (settings[type + "List"]? ",": "") + entry;
 		updateList(type);
 	};
 	scope.update = updateList;
@ -119,6 +115,7 @@
 		updateList("white");
 		updateList("ignore");
 		updateList("black");
-		updateStackList(prefs.stackList);
+		updateStackList(settings.stackList);
 	};
+	settings.onloaded(scope.updateAll);
 }());
--- a/lib/logging.js
+++ b/lib/logging.js
@ -9,14 +9,14 @@
 	if ((typeof exports) !== "undefined"){
 		scope = exports;
 	}
-	else if (window.scope){
-		window.scope.logging = {};
+	else {
+		if (!window.scope.logging){
+			window.scope.logging = {};
+		}
 		scope = window.scope.logging;
 	}
-	else {
-		window.logging = {};
-		scope = window.logging;
-	}
+
+	const settings = require("./settings");
 	
 	var prefix = "";
 	
@ -85,9 +85,14 @@
 			metaLog("logging queue cleared");
 		}
 	};
+	settings.on("isStillDefault", scope.clearQueue);
 	scope.error = error;
 	scope.warning = warning;
 	scope.message = message;
 	scope.notice = notice;
 	scope.verbose = verbose;
+	
+	require.emit("./logging");
+
+	metaLog("logging available");
 }());
--- a/lib/main.js
+++ b/lib/main.js
@ -4,23 +4,16 @@
 (function(){
 	"use strict";
 	
+	const settings = require("./settings");
 	const logging = require("./logging");
 	const {error, warning, message, notice, verbose, } = logging;
+	const lists = require("./lists");
 	logging.setPrefix("main script");
 	
-	message("start");
-	message("loading storage");
-	browser.storage.local.get().then(function(data){
-		Object.keys(data).forEach(function(key){
-			settings[key] = data[key];
-		});
-		settings.isStillDefault = false;
-		logging.clearQueue();
-		return settings;
-	}).then(function(settings){
+	message("start of background script");
+	message("waiting for settings to be loaded");
+	settings.onloaded(function(){
 		notice("everything loaded");
-		const lists = require("./lists");
-		lists.updateAll();
 		
 		notice("build persistent storage");
 		var persistentRnd = Object.create(null);
@ -66,11 +59,17 @@
 				verbose("got new domain rnd", data["canvasBlocker-new-domain-rnd"]);
 				data["canvasBlocker-set-domain-rnd"] = data["canvasBlocker-new-domain-rnd"];
 				persistentRnd[data["canvasBlocker-new-domain-rnd"].domain] = data["canvasBlocker-new-domain-rnd"].rnd;
-				browser.storage.local.get("storePersistentRnd").then(function(prefs){
-					if (prefs.storePersistentRnd){
-						browser.storage.local.set({persistentRndStorage: JSON.stringify(persistentRnd)});
-					}
-				});
+				if (settings.storePersistentRnd){
+					settings.persistentRndStorage = JSON.stringify(persistentRnd);
+				}
+				updateContentScripts();
+			}
+			if (data["canvasBlocker-clear-domain-rnd"]){
+				verbose("domain rnd cleared");
+				persistentRnd = Object.create(null);
+				if (settings.storePersistentRnd){
+					settings.persistentRndStorage = JSON.stringify(persistentRnd);
+				}
 				updateContentScripts();
 			}
 			notice("pass the message to the tabs");
@ -86,54 +85,40 @@
 			notice("got port", port);
 			verbose("send back the tab id", port.sender.tab.id);
 			verbose("send back the persistent random seeds", persistentRnd);
-			verbose("send back the settings", settings);
 			port.postMessage({
 				tabId: port.sender.tab.id,
-				persistentRnd: persistentRnd,
-				settings: settings
+				persistentRnd: persistentRnd
 			});
 			var url = new URL(port.sender.url);
 			port.onMessage.addListener(function(data){
-				browser.storage.local.get("showNotifications").then(function(data){
+				if (data.hasOwnProperty("canvasBlocker-notify")){
 					if (
-						(
-							!data.hasOwnProperty("showNotifications") ||
-							data.showNotifications
-						) &&
+						settings.showNotifications &&
 						!lists.get("ignore").match(url)
 					){
 						browser.pageAction.show(port.sender.tab.id);
 					}
-				});
+				}
 				verbose("got data", data, "from port", port);
 			});
 		});
 		
 		message("register storage change event listener");
-		browser.storage.onChanged.addListener(function(change, area){
-			if (area === "local"){
-				notice("settings changed", change);
-				notice("update settings object");
-				Object.keys(change).forEach(function(key){
-					settings[key] = change[key].newValue;
+		
+		settings.on("any", updateContentScripts);
+		settings.on("showNotifications", function({newValue}){
+			if (!newValue){
+				message("notifications were disabled -> hide all page actions");
+				browser.tabs.query({}).then(function(tabs){
+					tabs.forEach(function(tab){
+						browser.pageAction.hide(tab.id);
+					});
 				});
-				updateContentScripts();
-				
-				if (change.hasOwnProperty("showNotifications") && !change.showNotifications.newValue){
-					message("notifications were disabled -> hide all page actions");
-					browser.tabs.query({}).then(function(tabs){
-						tabs.forEach(function(tab){
-							browser.pageAction.hide(tab.id);
-						});
-					});
-				}
-				if (change.hasOwnProperty("storePersistentRnd")){
-					browser.storage.local.set({
-						persistentRndStorage: change.storePersistentRnd.newValue? JSON.stringify(persistentRnd): ""
-					});
-				}
 			}
 		});
+		settings.on("storePersistentRnd", function({newValue}){
+			settings.persistentRndStorage = newValue? JSON.stringify(persistentRnd): "";
+		});
 		
 		// hide page action when a tab is refreshed
 		browser.tabs.onUpdated.addListener(function(tabId, data){
--- a/lib/require.js
+++ b/lib/require.js
@ -6,9 +6,15 @@ const require = function(){
 	"use strict";
 	window.scope = {};
 	const scope = window.scope;
+
+	function getScopeName(module){
+		var scopeName = module.substr(2).replace(/\..+/, "");
+		return scopeName;
+	}
+
 	function require(module){
 		if (module.startsWith("./")){
-			var scopeName = module.substr(2).replace(/\..+/, "");
+			var scopeName = getScopeName(module);
 			return scope[scopeName];
 		}
 		else if (module === "sdk/getWrapped"){
@ -27,22 +33,31 @@ const require = function(){
 				return wrapped;
 			};
 		}
-		else if (module === "sdk/simple-prefs"){
-			return {
-				prefs: settings,
-				on: function(key, callback){
-					browser.storage.onChanged.addListener(function(changes, area){
-						if (area === "local"){
-							if (changes.hasOwnProperty(key)){
-								callback(changes[key].newValue);
-							}
-						}
-					});
-				}
-			};
-		}
 		throw new ReferenceError("Unable to get non relative module " + module + "!");
 	}

+	var events = {};
+	require.on = function(module, callback){
+		var scopeName = getScopeName(module);
+		if (scope.hasOwnProperty(scopeName)){
+			callback(scope[scopeName]);
+		}
+		else {
+			if (!events.hasOwnProperty(scopeName)){
+				events[scopeName] = [];
+			}
+			events[scopeName].push(callback);
+		}
+	};
+	require.emit = function(module){
+		var scopeName = getScopeName(module);
+		if (events[scopeName]){
+			events[scopeName].forEach(function(callback){
+				callback(scope[scopeName]);
+			});
+			events[scopeName] = [];
+		}
+	};
+
 	return require;
 }();
--- a/lib/settingDefinitions.js
+++ b/lib/settingDefinitions.js
@ -0,0 +1,118 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+(function(){
+	"use strict";
+
+	var settingDefinitions = [
+		{
+			name: "logLevel",
+			defaultValue: 1,
+			options: [0, 1, 25, 50, 75, 100]
+		},
+		{
+			name: "whiteList",
+			defaultValue: ""
+		},
+		{
+			name: "blackList",
+			defaultValue: ""
+		},
+		{
+			name: "blockMode",
+			defaultValue: "fakeReadout",
+			options: [
+				"blockReadout", "fakeReadout", "fakeInput", "askReadout", null,
+				"blockEverything", "block", "ask", "allow", "allowEverything"
+			]
+		},
+		{
+			name: "minFakeSize",
+			defaultValue: 1
+		},
+		{
+			name: "maxFakeSize",
+			defaultValue: 0
+		},
+		{
+			name: "rng",
+			defaultValue: "nonPersistent",
+			options: ["nonPersistent", "constant", "persistent"]
+		},
+		{
+			name: "useCanvasCache",
+			defaultValue: true
+		},
+		{
+			name: "ignoreFrequentColors",
+			defaultValue: 0
+		},
+		{
+			name: "fakeAlphaChannel",
+			defaultValue: false
+		},
+		{
+			name: "persistentRndStorage",
+			defaultValue: ""
+		},
+		{
+			name: "storePersistentRnd",
+			defaultValue: false
+		},
+		{
+			name: "askOnlyOnce",
+			defaultValue: true
+		},
+		{
+			name: "showNotifications",
+			defaultValue: true
+		},
+		{
+			name: "storeImageForInspection",
+			defaultValue: false
+		},
+		{
+			name: "notificationDisplayTime",
+			defaultValue: 30
+		},
+		{
+			name: "ignoreList",
+			defaultValue: ""
+		},
+		{
+			name: "showCallingFile",
+			defaultValue: false
+		},
+		{
+			name: "showCompleteCallingStack",
+			defaultValue: false
+		},
+		{
+			name: "enableStackList",
+			defaultValue: false
+		},
+		{
+			name: "stackList",
+			defaultValue: ""
+		},
+		{
+			name: "displayAdvancedSettings",
+			defaultValue: false
+		},
+		{
+			name: "isStillDefault",
+			defaultValue: true
+		},
+		{
+			name: "storageVersion",
+			defaultValue: 0.1
+		}
+	];
+	
+	if ((typeof module) !== "undefined"){
+		module.exports = settingDefinitions;
+	}
+	else {
+		window.scope.settingDefinitions = settingDefinitions;
+	}
+}());
--- a/lib/settings.js
+++ b/lib/settings.js
@ -1,7 +1,7 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
- (function(){
+(function(){
 	"use strict";

 	var scope;
@ -9,138 +9,144 @@
 		scope = exports;
 	}
 	else {
-		window.scope.settings = {};
-		scope = window.scope.settings;
+		scope = {};
+		window.scope.settings = scope;
 	}

-	var settingDefinitions = [
-		{
-			name: "logLevel",
-			defaultValue: 1
-		},
-		{
-			name: "whiteList",
-			defaultValue: ""
-		},
-		{
-			name: "blackList",
-			defaultValue: ""
-		},
-		{
-			name: "blockMode",
-			defaultValue: "fakeReadout",
-			options: ["blockReadout", "fakeReadout", "fakeInput", "askReadout", "blockEverything", "block", "ask", "allow", "allowEverything"]
-		},
-		{
-			name: "minFakeSize",
-			defaultValue: 1
-		},
-		{
-			name: "maxFakeSize",
-			defaultValue: 0
-		},
-		{
-			name: "rng",
-			defaultValue: "nonPersistent",
-			options: ["nonPersistent", "constant", "persistent"]
-		},
-		{
-			name: "useCanvasCache",
-			defaultValue: true
-		},
-		{
-			name: "ignoreFrequentColors",
-			defaultValue: 0
-		},
-		{
-			name: "fakeAlphaChannel",
-			defaultValue: false
-		},
-		{
-			name: "persistentRndStorage",
-			defaultValue: ""
-		},
-		{
-			name: "storePersistentRnd",
-			defaultValue: false
-		},
-		{
-			name: "askOnlyOnce",
-			defaultValue: true
-		},
-		{
-			name: "showNotifications",
-			defaultValue: true
-		},
-		{
-			name: "storeImageForInspection",
-			defaultValue: false
-		},
-		{
-			name: "notificationDisplayTime",
-			defaultValue: 30
-		},
-		{
-			name: "ignoreList",
-			defaultValue: ""
-		},
-		{
-			name: "showCallingFile",
-			defaultValue: false
-		},
-		{
-			name: "showCompleteCallingStack",
-			defaultValue: false
-		},
-		{
-			name: "enableStackList",
-			defaultValue: false
-		},
-		{
-			name: "stackList",
-			defaultValue: ""
-		},
-		{
-			name: "displayAdvancedSettings",
-			defaultValue: false
-		},
-		{
-			name: "isStillDefault",
-			defaultValue: true
-		}
-	];
-
-	var settings = {};
-	window.settings = {};
+	var logging = {};
+	(function(){
+		var loggingQueue = [];
+		require.on("./logging", function(realLogging){
+			logging = realLogging;
+			
+			loggingQueue.forEach(function(logEntry){
+				logging[logEntry.name](...logEntry.args, logEntry.date);
+			});
+			loggingQueue = [];
+		});
+		["error", "warning", "message", "notice", "verbose"].forEach(function(name){
+			logging[name] = function(...args){
+				loggingQueue.push({name, args, date: new Date()});
+			};
+		});
+	}());
+	const settingDefinitions = require("./settingDefinitions.js");
+	
+	const eventHandler = {any: []};
+	eventHandler.all = eventHandler.any;
+	const settings = {};

 	settingDefinitions.forEach(function(settingDefinition){
 		var name = settingDefinition.name;
 		settings[name] = settingDefinition.defaultValue;
-		Object.defineProperty(
-			window.settings,
-			{
-				name: name,
-				get: function(){
-					return settings[name]
-				},
-				set: function(newValue){
-					if ((typeof newValue) === (typeof settingDefinition.defaultValue)){
-						if (
-							!settingDefinition.options ||
-							settingDefinition.options.includes(newValue)
-						){
-							settings[name] = newValue;
-							
-						}
+		eventHandler[name] = [];
+
+		settingDefinition.on = function on(callback){
+			scope.on(name, callback);
+		};
+		settingDefinition.get = function getValue(){
+			return settings[name];
+		};
+		settingDefinition.set = function setValue(newValue){
+			if ((typeof newValue) === (typeof settingDefinition.defaultValue)){
+				if (
+					!settingDefinition.options ||
+					settingDefinition.options.includes(newValue)
+				){
+					settings[name] = newValue;
+					if (!settingDefinition.transient){
+						var storeObject = {};
+						storeObject[name] = newValue;
+						browser.storage.local.set(storeObject);
 					}
+					
 				}
+				else {
+					logging.warning("Provided value outside specified options for ", name, ":", newValue);
+				}
+			}
+			else {
+				logging.warning("Wrong type provided for setting", name, ":", newValue);
+			}
+		};
+		Object.defineProperty(
+			scope,
+			name,
+			{
+				get: settingDefinition.get,
+				set: settingDefinition.set
 			}
 		);
 	});

+	scope.getDefinition = function(name){
+		var foundDefinitions = settingDefinitions.filter(function(settingDefinition){
+			return name === settingDefinition.name;
+		});
+		if (foundDefinitions.length){
+			return Object.create(foundDefinitions[0]);
+		}
+		else {
+			return undefined;
+		}
+	};
+
 	scope.forEach = function forEachSetting(...args){
 		settingDefinitions.map(function(settingDefinition){
 			return Object.create(settingDefinition);
 		}).forEach(...args);
+	};
+	scope.on = function onSettingsChange(name, callback){
+		if (eventHandler.hasOwnProperty(name)){
+			eventHandler[name].push(callback);
+		}
+		else {
+			logging.warning("Unable to register event handler for unknown setting", name);
+		}
+	};
+
+	function changeValue(name, newValue){
+		var oldValue = settings[name];
+		settings[name] = newValue;
+		(eventHandler[name] || []).forEach(function(callback){
+			callback({name, newValue, oldValue});
+		});
 	}
+
+	logging.verbose("registering storage onchange listener");
+	browser.storage.onChanged.addListener(function(changes, area){
+		if (area === "local"){
+			logging.notice("settings changed", changes);
+			Object.entries(changes).forEach(function(entry){
+				const [name, change] = entry;
+				changeValue(name, change.newValue);
+			});
+			eventHandler.any.forEach(function(callback){
+				callback();
+			});
+		}
+	});
+
+	logging.verbose("loading settings");
+	scope.loaded = browser.storage.local.get().then(function(storage){
+		logging.message("settings loaded");
+		Object.entries(storage).forEach(function(entry){
+			const [name, value] = entry;
+			changeValue(name, value);
+		});
+		changeValue("isStillDefault", false);
+		
+		eventHandler.any.forEach(function(callback){
+			callback();
+		});
+	});
+	scope.onloaded = function(callback){
+		if (scope.isStillDefault){
+			scope.loaded.then(function(){callback();});
+		}
+		else {
+			callback();
+		}
+	};
+	Object.seal(scope);
 }());
--- a/manifest.json
+++ b/manifest.json
@ -8,8 +8,9 @@
 	},
 	"background": {
 		"scripts": [
-			"lib/defaultSettings.js",
 			"lib/require.js",
+			"lib/settingDefinitions.js",
+			"lib/settings.js",
 			"lib/logging.js",
 			"lib/lists.js",
 			"lib/main.js"
@ -20,8 +21,9 @@
 		"all_frames": true,
 		"run_at": "document_start",
 		"js": [
-			"lib/defaultSettings.js",
 			"lib/require.js",
+			"lib/settingDefinitions.js",
+			"lib/settings.js",
 			
 			"lib/logging.js",
 			
--- a/options/buildPrefInputs.js
+++ b/options/buildPrefInputs.js
@ -1,362 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-(function(){
-	"use strict";
-
-	const logging = require("./logging");
-
-	var table = document.createElement("table");
-	table.className = "settings";
-	document.body.appendChild(table);
-
-	[
-		{
-			"name": "displayAdvancedSettings",
-			"title": "Display advanced settings",
-			"type": "bool",
-			"value": false
-		},
-		{
-			"name": "blockMode",
-			"title": "block mode",
-			"type": "menulist",
-			"value": "fakeReadout",
-			"options": [
-				{
-					"value": "blockReadout",
-					"label": "block readout API"
-				},
-				{
-					"value": "fakeReadout",
-					"label": "fake readout API"
-				},
-				{
-					"value": "fakeInput",
-					"label": "fake input API"
-				},
-				{
-					"value": "askReadout",
-					"label": "ask for readout API permission"
-				},
-				{
-					"value": "",
-					"label": ""
-				},
-				{
-					"value": "blockEverything",
-					"label": "block everything"
-				},
-				{
-					"value": "block",
-					"label": "allow only white list"
-				},
-				{
-					"value": "ask",
-					"label": "ask for permission"
-				},
-				{
-					"value": "allow",
-					"label": "block only black list"
-				},
-				{
-					"value": "allowEverything",
-					"label": "allow everything"
-				}
-			]
-		},
-		{
-			"name": "whiteList",
-			"title": "White list",
-			"type": "string",
-			"value": "",
-			"displayDependencies": {
-				"blockMode": ["blockReadout", "fakeReadout", "fakeInput", "askReadout", "block", "ask"]
-			}
-		},
-		{
-			"name": "blackList",
-			"title": "Black list",
-			"type": "string",
-			"value": "",
-			"displayDependencies": {
-				"blockMode": ["blockReadout", "fakeReadout", "fakeInput", "askReadout", "ask", "allow"]
-			}
-		},
-		{
-			"name": "minFakeSize",
-			"title": "Minimal fake size",
-			"type": "integer",
-			"value": 1,
-			"displayDependencies": {
-				"blockMode": ["fakeReadout", "fakeInput"],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "maxFakeSize",
-			"title": "Maximal fake size",
-			"type": "integer",
-			"value": 0,
-			"displayDependencies": {
-				"blockMode": ["fakeReadout", "fakeInput"],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "rng",
-			"title": "Random number generator",
-			"type": "menulist",
-			"value": "nonPersistent",
-			"options": [
-				{
-					"value": "nonPersistent",
-					"label": "non persistent"
-				},
-				{
-					"value": "constant",
-					"label": "constant"
-				},
-				{
-					"value": "persistent",
-					"label": "persistent"
-				}
-			],
-			"displayDependencies": {
-				"blockMode": ["fakeReadout", "fakeInput"],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "storePersistentRnd",
-			"title": "Store persistent data",
-			"type": "bool",
-			"value": false,
-			"displayDependencies": {
-				"blockMode": ["fakeReadout", "fakeInput"],
-				"rng": ["persistent"],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "clearPersistentRnd",
-			"title": "Clear persistent random storage",
-			"type": "control",
-			"label": "Clear",
-			"displayDependencies": {
-				"blockMode": ["fakeReadout", "fakeInput"],
-				"rng": ["persistent"],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "ignoreFrequentColors",
-			"title": "Ignore most frequent colors",
-			"type": "integer",
-			"value": 0,
-			"displayDependencies": {
-				"blockMode": ["fakeReadout"],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "fakeAlphaChannel",
-			"title": "Fake the alpha channel",
-			"type": "bool",
-			"value": false,
-			"displayDependencies": {
-				"blockMode": ["fakeReadout"],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "useCanvasCache",
-			"title": "Use canvas cache",
-			"type": "bool",
-			"value": true,
-			"displayDependencies": {
-				"blockMode": ["fakeReadout"],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "askOnlyOnce",
-			"title": "Ask only once",
-			"type": "bool",
-			"value": true,
-			"displayDependencies": {
-				"blockMode": ["askReadout", "ask"]
-			}
-		},
-		{
-			"name": "showNotifications",
-			"title": "Show notifications",
-			"type": "bool",
-			"value": true,
-			"displayDependencies": {
-				"blockMode": ["fakeReadout", "fakeInput"]
-			}
-		},
-		{
-			"name": "storeImageForInspection",
-			"title": "Store image for inspection",
-			"type": "bool",
-			"value": false,
-			"displayDependencies": {
-				"blockMode": ["fakeReadout", "fakeInput"],
-				"showNotifications": [true],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "ignoreList",
-			"title": "Ignore list",
-			"type": "string",
-			"value": "",
-			"displayDependencies": {
-				"blockMode": ["fakeReadout", "fakeInput"],
-				"showNotifications": [true]
-			}
-		},
-		{
-			"name": "showCallingFile",
-			"title": "Display calling file",
-			"type": "bool",
-			"value": false,
-			"displayDependencies": {
-				"blockMode": ["askReadout", "ask"],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "showCompleteCallingStack",
-			"title": "Display complete calling stack",
-			"type": "bool",
-			"value": false,
-			"displayDependencies": [
-				{
-					"blockMode": ["fakeReadout", "fakeInput"],
-					"showNotifications": [true],
-					"displayAdvancedSettings": [true]
-				},
-				{
-					"blockMode": ["askReadout", "ask"],
-					"displayAdvancedSettings": [true]
-				}
-			]
-		},
-		{
-			"name": "enableStackList",
-			"title": "Use file specific scoped white list",
-			"type": "bool",
-			"value": false,
-			"displayDependencies": {
-				"blockMode": ["blockReadout", "fakeReadout", "fakeInput", "askReadout", "block", "ask"],
-				"displayAdvancedSettings": [true]
-			}
-		},
-		{
-			"name": "stackList",
-			"title": "File specific white list",
-			"type": "string",
-			"value": "",
-			"displayDependencies": {
-				"enableStackList": [true],
-				"displayAdvancedSettings": [true]
-			}
-			
-		},
-		{
-			"name": "showReleaseNotes",
-			"title": "Release notes",
-			"type": "control",
-			"label": "Show"
-		},
-		{
-			"name": "logLevel",
-			"title": "logging level",
-			"type": "menulist",
-			"value": 1,
-			"options": [
-				{
-					"value": 0,
-					"label": "none"
-				},
-				{
-					"value": 1,
-					"label": "error"
-				},
-				{
-					"value": 25,
-					"label": "warning"
-				},
-				{
-					"value": 50,
-					"label": "message"
-				},
-				{
-					"value": 75,
-					"label": "notice"
-				},
-				{
-					"value": 100,
-					"label": "verbose"
-				}
-			],
-			"displayDependencies": {
-				"displayAdvancedSettings": [true]
-			}
-		}
-	].forEach(function(pref){
-		var html = "<td><div class=\"content\">" +
-			"<span class=\"title\">__MSG_" + pref.name + "_title__</span>" +
-			"<div class=\"description\">__MSG_" + pref.name + "_description__</div>" +
-			"</div></td><td><div class=\"content\">";
-		var inputAttributes =
-			" data-storage-name=\"" + pref.name + "\"" +
-			" data-storage-type=\"" + pref.type + "\"" +
-			" class=\"setting\"";
-		switch (pref.type){
-			case "integer":
-				html += "<input type=\"number\"" + inputAttributes + " value=\"" + pref.value + "\">";
-				break;
-			case "string":
-				html += "<input type=\"text\"" + inputAttributes + " value=\"" + pref.value + "\">";
-				break;
-			case "bool":
-				html += "<input type=\"checkbox\" style=\"display: inline\"" +
-					inputAttributes +
-					(pref.value? " checked=\"checked\"": "") +
-					">";
-				break;
-			case "menulist":
-				html += "<select" + inputAttributes + "data-type=\"" + (typeof pref.value) + "\">" +
-					pref.options.map(function(option){
-						if (option.value !== ""){
-							return "<option value=\"" + option.value + "\"" +
-								(option.value === pref.value? " selected": "") +
-								">" +
-								"__MSG_" + pref.name + "_options." + option.label + "__" +
-								"</option>";
-						}
-						else {
-							return "<option disabled>----------------</option>";
-						}
-					}).join("") +
-					"</select>";
-				break;
-			case "control":
-				html += "<button" + inputAttributes + "\">__MSG_" + pref.name + "_label__</button>";
-				break;
-			default:
-				logging.warning("Unknown preference type: " + pref.type);
-		}
-		html += "</div></td>";
-		var tr = document.createElement("tr");
-		tr.setting = pref;
-		tr.className = "settingRow";
-		tr.innerHTML = html;
-		logging.verbose(html);
-		table.appendChild(tr);
-	});
-}());
--- a/options/options.html
+++ b/options/options.html
@ -6,10 +6,12 @@
 		<meta http-equiv="content-type" content="text/html; charset=UTF-8">
 	</head>
 	<body>
-		<script src="../lib/defaultSettings.js"></script>
-        <script src="../lib/require.js"></script>
+		<script src="../lib/require.js"></script>
+		<script src="../lib/settingDefinitions.js"></script>
+		<script src="../lib/settings.js"></script>
 		<script src="../lib/logging.js"></script>
-		<script src="buildPrefInputs.js"></script>
+		<script src="optionsGui.js"></script>
+		<script src="settingsDisplay.js"></script>
 		<script src="options.js"></script>
 	</body>
 </html>
--- a/options/options.js
+++ b/options/options.js
@ -5,131 +5,64 @@
 	"use strict";

 	const logging = require("./logging");
+	logging.setPrefix("options page");
+	
+	const optionsGui = require("./optionsGui");
+	const settings = require("./settings");
+	const settingsDisplay = require("./settingsDisplay");

-	browser.storage.local.get().then(function(data){
-		Object.keys(data).forEach(function(key){
-			settings[key] = data[key];
-		});
-		settings.isStillDefault = false;
-		logging.setPrefix("options page");
-		logging.clearQueue();
-		return settings;
-	}).then(function(settings){
-		function traverse(node, func){
-			func(node);
-			Array.from(node.childNodes).forEach(function(child){traverse(child, func);});
+	var callbacks = {
+		showReleaseNotes: function(){
+			logging.verbose("open release notes");
+			window.open("../releaseNotes.txt", "_blank");
+		},
+		clearPersistentRnd: function(){
+			logging.message("clear persistent rnd storage");
+			logging.notice("empty storage");
+			settings.persistentRndStorage = "";
+			logging.notice("send message to main script");
+			browser.runtime.sendMessage({"canvasBlocker-clear-domain-rnd": true});
 		}
-		
-		// getting the translation of all the messages
-		logging.message("translate all messages");
-		traverse(document.body, function(node){
-			if (node.nodeType === 3){
-				var lines = node.nodeValue.replace(/\b__MSG_(.+)__\b/g, function(m, key){
-					try {
-						return browser.i18n.getMessage(key);
-					}
-					catch (e){
-						return "Unknown i18n key: " + key;
-					}
-				}).split(/\n/g);
-				node.nodeValue = lines.shift();
-				lines.forEach(function(line){
-					node.parentNode.appendChild(document.createElement("br"));
-					node.parentNode.appendChild(document.createTextNode(line));
-				});
+	};
+	
+	var table = document.createElement("table");
+	table.className = "settings";
+	document.body.appendChild(table);
+	settingsDisplay.forEach(function(display){
+		var setting = settings.getDefinition(display.name);
+		if (!setting){
+			if (callbacks[display.name]){
+				setting = {
+					name: display.name,
+					action: callbacks[display.name]
+				};
 			}
-		});
-		
-		logging.message("register events to store changes in local storage");
-		Array.from(document.querySelectorAll("input.setting, select.setting")).forEach(function(input){
-			var storageName = input.dataset.storageName;
-			if (input.type === "checkbox"){
-				input.checked = settings[storageName];
-				
-				input.addEventListener("click", function(){
-					logging.message("changed setting", storageName, ":", this.checked);
-					var value = this.checked;
-					var obj = {};
-					obj[storageName] = value;
-					browser.storage.local.set(obj);
-				});
-			}
-			else {
-				input.value = settings[storageName];
-				
-				input.addEventListener("change", function(){
-					var value = this.value;
-					if (this.type === "number" || this.dataset.type === "number"){
-						value = parseFloat(value);
-					}
-					logging.message("changed setting", storageName, ":", value);
-					var obj = {};
-					obj[storageName] = value;
-					browser.storage.local.set(obj);
-				});
-			}
-		});
-		
-		var callbacks = {
-			showReleaseNotes: function(){
-				logging.verbose("open release notes");
-				window.open("../releaseNotes.txt", "_blank");
-			},
-			clearPersistentRnd: function(){
-				logging.message("clear persistent rnd storage");
-				logging.notice("empty storage");
-				browser.storage.local.set({persistentRndStorage: ""});
-				logging.notice("send message to main script");
-				browser.runtime.sendMessage({"canvasBlocker-clear-domain-rnd": true});
-			}
-		};
-		Array.from(document.querySelectorAll("button.setting")).forEach(function(button){
-			var storageName = button.dataset.storageName;
-			button.addEventListener("click", function(){
-				if (callbacks[storageName]){
-					callbacks[storageName]();
-				}
-			});
-		});
-		
-		function updateDisplay(){
-			logging.notice("update display");
-			document.querySelectorAll("tr.settingRow").forEach(function(row){
-				logging.verbose("evaluate display dependencies for", row.setting);
-				var displayDependencies = row.setting.displayDependencies;
-				if (displayDependencies){
+		}
+		if (setting){
+			var row = optionsGui.createSettingRow(setting);
+			table.appendChild(row);
+			if (display.displayDependencies){
+				var displayDependencies = display.displayDependencies;
+				displayDependencies = Array.isArray(displayDependencies)?
+					displayDependencies:
+					[displayDependencies];
+				var computeDependencies = function(){
+					logging.verbose("evaluate display dependencies for", setting);
 					row.classList[(
-						(
-							Array.isArray(displayDependencies)?
-								displayDependencies:
-								[displayDependencies]
-						).some(function(displayDependency){
+						displayDependencies.some(function(displayDependency){
 							return Object.keys(displayDependency).every(function(key){
 								return displayDependency[key].indexOf(settings[key]) !== -1;
 							});
 						})
 					)? "remove": "add"]("hidden");
-				}
-			});
-		}
-		updateDisplay();
-		
-		browser.storage.onChanged.addListener(function(change, area){
-			if (area === "local"){
-				Object.keys(change).forEach(function(key){
-					settings[key] = change[key].newValue;
-					var input = document.querySelector(".setting[data-storage-name=" + key + "]");
-					if (input){
-						if (input.type === "checkbox"){
-							input.checked = change[key].newValue;
-						}
-						else {
-							input.value = change[key].newValue;
-						}
-					}
+				};
+				computeDependencies();
+				displayDependencies.forEach(function(displayDependency){
+					Object.keys(displayDependency).forEach(function(name){
+						settings.on(name, computeDependencies);
+					});
 				});
-				updateDisplay();
 			}
-		});
+		}
 	});
 }());
--- a/options/optionsGui.js
+++ b/options/optionsGui.js
@ -0,0 +1,171 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+(function(){
+	"use strict";
+
+	var scope;
+	if ((typeof exports) !== "undefined"){
+		scope = exports;
+	}
+	else {
+		scope = {};
+		window.scope.optionsGui = scope;
+	}
+
+	const logging = require("./logging");
+
+	function createDescription(setting){
+		var c = document.createElement("div");
+		c.className = "content";
+
+		var title = document.createElement("span");
+		title.className = "title";
+		title.textContent = browser.i18n.getMessage(setting.name + "_title");
+		c.appendChild(title);
+
+		var description = document.createElement("div");
+		description.className = "description";
+		description.textContent = browser.i18n.getMessage(setting.name + "_description");
+		c.appendChild(description);
+
+		return c;
+	}
+
+	function createSelect(setting){
+		var select = document.createElement("select");
+		select.dataset.type = typeof setting.defaultValue;
+		setting.options.forEach(function(value){
+			var option = document.createElement("option");
+			if (typeof value === typeof setting.defaultValue){
+				option.value = value;
+				if (setting.defaultValue === value){
+					option.selected = true;
+				}
+				option.text = browser.i18n.getMessage(setting.name + "_options." + value) || value;
+			}
+			else {
+				option.disabled = true;
+				option.text = "\u2500".repeat(20);
+			}
+			select.appendChild(option);
+		});
+		return select;
+	}
+	
+	var inputTypes = {
+		number: {
+			input: function(input, value){
+				input.type = "number";
+				input.value = value;
+				return input;
+			},
+			updateCallback: function(input, setting){
+				input.value = setting.get();
+				return input.value;
+			},
+			changeCallback: function(input, setting){
+				setting.set(parseFloat(input.value));
+				return parseFloat(input.value);
+			}
+		},
+		string: {
+			input: function(input, value){
+				input.type = "text";
+				input.value = value;
+				return input;
+			},
+			updateCallback: function(input, setting){
+				input.value = setting.get();
+				return input.value;
+			},
+			changeCallback: function(input, setting){
+				setting.set(input.value);
+				return input.value;
+			}
+		},
+		boolean: {
+			input: function(input, value){
+				input.type = "checkbox";
+				input.checked = value;
+				input.style.display = "inline";
+				return input;
+			},
+			updateCallback: function(input, setting){
+				input.checked = setting.get();
+				return input.checked;
+			},
+			changeCallback: function(input, setting){
+				setting.set(input.checked);
+				return input.checked;
+			}
+		}
+	};
+
+	function createInput(setting){
+		var type = inputTypes[typeof setting.defaultValue];
+		var input;
+		if (setting.options){
+			input = createSelect(setting);
+		}
+		else {
+			input = document.createElement("input");
+			if (type){
+				type.input(input, setting.defaultValue);
+			}
+		}
+		if (type){
+			setting.on(function(){type.updateCallback(input, setting);});
+			input.addEventListener("change", function(){
+				var value = type.changeCallback(input, setting);
+				logging.message("changed setting", setting.name, ":", value);
+				
+			});
+		}
+		return input;
+	}
+
+	function createButton(setting){
+		var button = document.createElement("button");
+		button.textContent = browser.i18n.getMessage(setting.name + "_label");
+		button.addEventListener("click", setting.action);
+		return button;
+	}
+
+	function createInteraction(setting){
+		var c = document.createElement("div");
+		c.className = "content";
+
+		var interaction;
+		if (setting.action){
+			interaction = createButton(setting);
+		}
+		else {
+			interaction = createInput(setting);
+		}
+
+		interaction.className = "setting";
+		interaction.dataset.storageName = setting.name;
+		interaction.dataset.storageType = typeof setting.defaultValue;
+
+		c.appendChild(interaction);
+		return c;
+	}
+
+	function createSettingRow(setting){
+		var tr = document.createElement("tr");
+		tr.className = "settingRow";
+
+		var left = document.createElement("td");
+		left.appendChild(createDescription(setting));
+		tr.appendChild(left);
+
+		var right = document.createElement("td");
+		right.appendChild(createInteraction(setting));
+		tr.appendChild(right);
+
+		return tr;
+	}
+
+	scope.createSettingRow = createSettingRow;
+}());
--- a/options/settingsDisplay.js
+++ b/options/settingsDisplay.js
@ -0,0 +1,163 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+(function(){
+	"use strict";
+	var settingsDisplay = [
+		{
+			"name": "displayAdvancedSettings"
+		},
+		{
+			"name": "blockMode"
+		},
+		{
+			"name": "whiteList",
+			"displayDependencies": {
+				"blockMode": ["blockReadout", "fakeReadout", "fakeInput", "askReadout", "block", "ask"]
+			}
+		},
+		{
+			"name": "blackList",
+			"displayDependencies": {
+				"blockMode": ["blockReadout", "fakeReadout", "fakeInput", "askReadout", "ask", "allow"]
+			}
+		},
+		{
+			"name": "minFakeSize",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout", "fakeInput"],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "maxFakeSize",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout", "fakeInput"],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "rng",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout", "fakeInput"],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "storePersistentRnd",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout", "fakeInput"],
+				"rng": ["persistent"],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "clearPersistentRnd",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout", "fakeInput"],
+				"rng": ["persistent"],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "ignoreFrequentColors",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout"],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "fakeAlphaChannel",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout"],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "useCanvasCache",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout"],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "askOnlyOnce",
+			"displayDependencies": {
+				"blockMode": ["askReadout", "ask"]
+			}
+		},
+		{
+			"name": "showNotifications",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout", "fakeInput"]
+			}
+		},
+		{
+			"name": "storeImageForInspection",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout", "fakeInput"],
+				"showNotifications": [true],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "ignoreList",
+			"displayDependencies": {
+				"blockMode": ["fakeReadout", "fakeInput"],
+				"showNotifications": [true]
+			}
+		},
+		{
+			"name": "showCallingFile",
+			"displayDependencies": {
+				"blockMode": ["askReadout", "ask"],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "showCompleteCallingStack",
+			"displayDependencies": [
+				{
+					"blockMode": ["fakeReadout", "fakeInput"],
+					"showNotifications": [true],
+					"displayAdvancedSettings": [true]
+				},
+				{
+					"blockMode": ["askReadout", "ask"],
+					"displayAdvancedSettings": [true]
+				}
+			]
+		},
+		{
+			"name": "enableStackList",
+			"displayDependencies": {
+				"blockMode": ["blockReadout", "fakeReadout", "fakeInput", "askReadout", "block", "ask"],
+				"displayAdvancedSettings": [true]
+			}
+		},
+		{
+			"name": "stackList",
+			"displayDependencies": {
+				"enableStackList": [true],
+				"displayAdvancedSettings": [true]
+			}
+			
+		},
+		{
+			"name": "showReleaseNotes"
+		},
+		{
+			"name": "logLevel",
+			"displayDependencies": {
+				"displayAdvancedSettings": [true]
+			}
+		}
+	];
+	
+	if ((typeof module) !== "undefined"){
+		module.exports = settingsDisplay;
+	}
+	else {
+		window.scope.settingsDisplay = settingsDisplay;
+	}
+}());
--- a/pageAction/pageAction.html
+++ b/pageAction/pageAction.html
@ -10,9 +10,10 @@
 		<ul id="prints">
 			<li>...</li>
 		</ul>
-        <script src="../lib/defaultSettings.js"></script>
        <script src="../lib/require.js"></script>
-        <script src="../lib/logging.js"></script>
+        <script src="../lib/settingDefinitions.js"></script>
+        <script src="../lib/settings.js"></script>
+		<script src="../lib/logging.js"></script>
        <script src="../lib/lists.js"></script>
        <script src="../lib/callingStack.js"></script>
        <script src="gui.js"></script>
--- a/pageAction/pageAction.js
+++ b/pageAction/pageAction.js
@ -1,149 +1,143 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-Promise.all([
-	browser.tabs.query({active: true, currentWindow: true}),
-	browser.storage.local.get().then(function(data){
-		"use strict";
-		Object.keys(data).forEach(function(key){
-			settings[key] = data[key];
-		});
-		settings.isStillDefault = false;
-		require("./logging").clearQueue();
-		return settings;
-	})
-]).then(function(values){
+(function(){
 	"use strict";
-	const [tabs, settings] = values;
-	
+
+	const settings = require("./settings");
+	const lists = require("./lists");
+	const {parseErrorStack} = require("./callingStack");
 	const {error, warning, message, notice, verbose, setPrefix: setLogPrefix} = require("./logging");
+	setLogPrefix("page action script");
+
 	const domainNotification = require("./domainNotification");
 	const Notification = require("./Notification");
 	const {createActionButtons, modalPrompt} = require("./gui");
-	setLogPrefix("page action script");

-	notice("create global action buttons");
+	Promise.all([
+		browser.tabs.query({active: true, currentWindow: true}),
+		settings.loaded
+	]).then(function(values){
+		const tabs = values[0];
+		
+		notice("create global action buttons");

-	createActionButtons(
-		document.getElementById("globalActions"),
-		[{
-			name: "disableNotifications",
-			isIcon: true,
-			callback: function(){
-				browser.storage.local.set({showNotifications: false});
-				window.close();
-			}
-		}],
-		undefined
-	);
-	
-	if (!tabs.length){
-		throw new Error("noTabsFound");
-	}
-	else if (tabs.length > 1){
-		error(tabs);
-		throw new Error("tooManyTabsFound");
-	}
-	
-	const lists = require("./lists");
-	lists.updateAll();
-	const {parseErrorStack} = require("./callingStack");
-
-	verbose("registering domain actions");
-	[
-		{
-			name: "ignorelistDomain",
-			isIcon: true,
-			callback: function(domain){
-				modalPrompt(
-					browser.i18n.getMessage("inputIgnoreDomain"),
-					domain
-				).then(function(domain){
-					if (domain){
-						lists.appendTo("ignore", domain);
-					}
+		createActionButtons(
+			document.getElementById("globalActions"),
+			[{
+				name: "disableNotifications",
+				isIcon: true,
+				callback: function(){
+					settings.showNotifications = false;
 					window.close();
+				}
+			}],
+			undefined
+		);
+		
+		if (!tabs.length){
+			throw new Error("noTabsFound");
+		}
+		else if (tabs.length > 1){
+			error(tabs);
+			throw new Error("tooManyTabsFound");
+		}
+		
+
+		verbose("registering domain actions");
+		[
+			{
+				name: "ignorelistDomain",
+				isIcon: true,
+				callback: function(domain){
+					modalPrompt(
+						browser.i18n.getMessage("inputIgnoreDomain"),
+						domain
+					).then(function(domain){
+						if (domain){
+							lists.appendTo("ignore", domain);
+						}
+						window.close();
+					});
+				}
+			},
+			{
+				name: "whitelistDomain",
+				isIcon: true,
+				callback: function(domain){
+					modalPrompt(
+						browser.i18n.getMessage("inputWhitelistURL"),
+						domain
+					).then(function(domain){
+						if (domain){
+							lists.appendTo("white", domain);
+						}
+						window.close();
+					});
+				}
+			}
+		].forEach(function(domainAction){
+			domainNotification.addAction(domainAction);
+		});
+
+		verbose("registering notification actions");
+		[
+			{
+				name: "displayFullURL",
+				isIcon: true,
+				callback: function({url}){
+					alert(url.href);
+				}
+			},
+			{
+				name: "displayCallingStack",
+				isIcon: true,
+				callback: function({errorStack}){
+					alert(parseErrorStack(errorStack));
+				}
+			},
+			{
+				name: "whitelistURL",
+				isIcon: true,
+				callback: function({url}){
+					modalPrompt(
+						browser.i18n.getMessage("inputWhitelistDomain"),
+						"^" + url.href.replace(/([\\+*?[^\]$(){}=!|.])/g, "\\$1") + "$"
+					).then(function(url){
+						if (url){
+							lists.appendTo("white", url);
+						}
+						window.close();
+					});
+				}
+			}
+		].forEach(function(action){
+			Notification.addAction(action);
+		});
+		
+		var tab = tabs[0];
+		browser.runtime.onMessage.addListener(function(data){
+			if (Array.isArray(data["canvasBlocker-notifications"])){
+				message("got notifications");
+				data["canvasBlocker-notifications"].forEach(function(notification){
+					verbose(notification);
+					notification.url = new URL(notification.url);
+					domainNotification(
+						notification.url.hostname,
+						notification.messageId
+					).addNotification(new Notification(notification));
 				});
 			}
-		},
-		{
-			name: "whitelistDomain",
-			isIcon: true,
-			callback: function(domain){
-				modalPrompt(
-					browser.i18n.getMessage("inputWhitelistURL"),
-					domain
-				).then(function(domain){
-					if (domain){
-						lists.appendTo("white", domain);
-					}
-					window.close();
-				});
+		});
+		message("request notifications from tab", tab.id);
+		browser.tabs.sendMessage(
+			tab.id,
+			{
+				"canvasBlocker-sendNotifications": tab.id
 			}
-		}
-	].forEach(function(domainAction){
-		domainNotification.addAction(domainAction);
+		);
+		notice("waiting for notifications");
+	}).catch(function(e){
+		error(e);
 	});
-
-	verbose("registering notification actions");
-	[
-		{
-			name: "displayFullURL",
-			isIcon: true,
-			callback: function({url}){
-				alert(url.href);
-			}
-		},
-		{
-			name: "displayCallingStack",
-			isIcon: true,
-			callback: function({errorStack}){
-				alert(parseErrorStack(errorStack));
-			}
-		},
-		{
-			name: "whitelistURL",
-			isIcon: true,
-			callback: function({url}){
-				modalPrompt(
-					browser.i18n.getMessage("inputWhitelistDomain"),
-					"^" + url.href.replace(/([\\+*?[^\]$(){}=!|.])/g, "\\$1") + "$"
-				).then(function(url){
-					if (url){
-						lists.appendTo("white", url);
-					}
-					window.close();
-				});
-			}
-		}
-	].forEach(function(action){
-		Notification.addAction(action);
-	});
-	
-	var tab = tabs[0];
-	browser.runtime.onMessage.addListener(function(data){
-		if (Array.isArray(data["canvasBlocker-notifications"])){
-			message("got notifications");
-			data["canvasBlocker-notifications"].forEach(function(notification){
-				verbose(notification);
-				notification.url = new URL(notification.url);
-				domainNotification(
-					notification.url.hostname,
-					notification.messageId
-				).addNotification(new Notification(notification));
-			});
-		}
-	});
-	message("request notifications from tab", tab.id);
-	browser.tabs.sendMessage(
-		tab.id,
-		{
-			"canvasBlocker-sendNotifications": tab.id
-		}
-	);
-	notice("waiting for notifications");
-}).catch(function(e){
-	"use strict";
-	require("./logging").error(e);
-});
+}());
--- a/releaseNotes.txt
+++ b/releaseNotes.txt
@ -1,8 +1,4 @@
 Version 0.4.1:
-	todos:
-		- get rid of the .innerHTML assigments
-		- better and saver settings system
-	
 	changes:
 		- improved design of the page action display
 		-