added "share persistent randomness between domains"

Fixes #290

_locales/de/messages.json

@@ -455,6 +455,18 @@
 		"message": "Leeren",
 		"description": ""
 	},
+	"sharePersistentRndBetweenDomains_title": {
+		"message": "Persistente Zufallszahlen zwischen Domains teilen",
+		"description": ""
+	},
+	"sharePersistentRndBetweenDomains_description": {
+		"message": "ACHTUNG: diese Einstellung macht den Browser 100% eindeutig identifizierbar und ist damit eine Gefährdung Ihrer Privatsphäre.",
+		"description": ""
+	},
+	"sharePersistentRndBetweenDomains_confirmMessage": {
+		"message": "Sind Sie sicher, dass sie die persistenten Zufallszahlen zwischen Domains teilen wollen?\nACHTUNG: dies macht den Browser 100% eindeutig identifizierbar und ist damit eine Gefährdung Ihrer Privatsphäre.",
+		"description": ""
+	},
 	"ignoreFrequentColors_title": {
 		"message": "Ignoriere die häufigsten Farben",
 		"description": ""
@@ -1107,6 +1119,10 @@
 		"message": "Leistung",
 		"description": ""
 	},
+	"sanitation_ruleset.privacy": {
+		"message": "Privatsphäre",
+		"description": ""
+	},
 	"sanitation_error.unnecessaryURLValue": {
 		"message": "Der URL-Wert für \"{url}\" ist identisch zur globalen Einstellung für \"{setting-title}\".",
 		"description": ""
@@ -1182,5 +1198,9 @@
 	"sanitation_error.storeImage": {
 		"message": "Bilder für Betrachtung zu speichern führt zu einem hohen RAM-Verbrauch.",
 		"description": ""
+	},
+	"sanitation_error.doNotSharePersistentRndBetweenDomains": {
+		"message": "Teilen Sie die persistenten Zufallszahlen nicht zwischen Domains, da dies den Browser 100% eindeutig identifizierbar macht.",
+		"description": ""
 	}
 }

_locales/en/messages.json

@@ -339,7 +339,7 @@
 		"description": ""
 	},
 	"protectedCanvasPart_description": {
-		"message": "readout: the readout features of the canvas API are protected.\n\ninput: the input features of the canvas API are protected. With blocking mode \"fake\" the drawn pixels get modified slightly when displaying text . This makes the detection of the add-on harder but is less secure. With WebGL canvases the behaviour is identical to \"readout\".\n\neverything: both the readout and input features are protected. It's not recommended to use this with \"fake\" block mode as it increases the probability to be detected.",
+		"message": "readout: the readout features of the canvas API are protected.\n\ninput: the input features of the canvas API are protected. With blocking mode \"fake\" the drawn pixels get modified slightly when displaying text. This makes the detection of the add-on harder but is less secure. With WebGL canvases the behaviour is identical to \"readout\".\n\neverything: both the readout and input features are protected. It's not recommended to use this with \"fake\" block mode as it increases the probability to be detected.",
 		"description": ""
 	},
 	"protectedCanvasPart_options.input": {
@@ -480,6 +480,19 @@
 		"description": ""
 	},
 	
+	"sharePersistentRndBetweenDomains_title": {
+		"message": "Share persistent randomness between domains",
+		"description": ""
+	},
+	"sharePersistentRndBetweenDomains_description": {
+		"message": "CAUTION: this setting makes the browser 100% trackable and is therefore a threat to your privacy.",
+		"description": ""
+	},
+	"sharePersistentRndBetweenDomains_confirmMessage": {
+		"message": "Are you really sure you want to share the persistent randomness between domains?\nCAUTION: this makes the browser 100% trackable and is therefore a threat to your privacy.",
+		"description": ""
+	},
+	
 	"ignoreFrequentColors_title": {
 		"message": "Ignore the most frequent colors",
 		"description": ""
@@ -1159,6 +1172,10 @@
 		"message": "Performance",
 		"description": ""
 	},
+	"sanitation_ruleset.privacy": {
+		"message": "Privacy",
+		"description": ""
+	},
 	"sanitation_error.unnecessaryURLValue": {
 		"message": "URL value for \"{url}\" is the same as the global setting for \"{setting-title}\".",
 		"description": ""
@@ -1234,5 +1251,9 @@
 	"sanitation_error.storeImage": {
 		"message": "Storing the image for inspection has a high RAM footprint.",
 		"description": ""
+	},
+	"sanitation_error.doNotSharePersistentRndBetweenDomains": {
+		"message": "Do not share persistent randomness between domains because this makes the browser 100% trackable.",
+		"description": ""
 	}
 }

lib/randomSupplies.js

@@ -66,6 +66,9 @@
 	const settings = require("./settings");
 	
 	function getDomain(window){
+		if (settings.sharePersistentRndBetweenDomains){
+			return "shared://domain";
+		}
 		if (!window.location.href || window.location.href === "about:blank"){
 			if (window !== window.parent){
 				return getDomain(window.parent);

lib/settingDefinitions.js

@@ -162,6 +162,10 @@
 			name: "lastPersistentRndClearing",
 			defaultValue: 0
 		},
+		{
+			name: "sharePersistentRndBetweenDomains",
+			defaultValue: false
+		},
 		{
 			name: "askOnlyOnce",
 			defaultValue: "individual",

options/options.js

@@ -254,6 +254,8 @@
 	};
 	addSection();
 	
+	const beforeChangeEventListeners = {};
+	
 	const {hide: hideContainer, expand: expandContainer} = settings.getContainers();
 	settingsDisplay.forEach(function(display){
 		if (typeof display === "string"){
@@ -291,6 +293,22 @@
 			if (setting){
 				setting.display = display;
 				
+				let originalSet = setting.set;
+				if (originalSet){
+					const eventListeners = [];
+					beforeChangeEventListeners[setting.name] = eventListeners;
+					setting.set = function(...args){
+						if (eventListeners.every(function(listener){
+							return listener.call(setting, ...args);
+						})){
+							return originalSet.apply(this, args);
+						}
+						else {
+							return false;
+						}
+					}
+				}
+				
 				let hideChangeListeners = [];
 				setting.setHide = function setHide(value){
 					if (hideContainer){
@@ -416,6 +434,14 @@
 				}
 			}
 		});
+		beforeChangeEventListeners.sharePersistentRndBetweenDomains.push(function(value){
+			if (value){
+				if (!confirm(browser.i18n.getMessage("sharePersistentRndBetweenDomains_confirmMessage"))){
+					return false;
+				}
+			}
+			return true;
+		});
 	});
 	
 	searchInput.search();

options/optionsGui.js

@@ -128,9 +128,13 @@
 			setting.on(function(){type.updateCallback(input, setting.get(url));}, url);
 			input.addEventListener("change", function(){
 				var value = type.getValue(input);
-				setting.set(value, url);
-				logging.message("changed setting", setting.name, ":", value);
-				
+				if (setting.set(value, url)){
+					logging.message("changed setting", setting.name, ":", value);
+				}
+				else {
+					type.updateCallback(input, setting.get(url));
+					logging.message("setting", setting.name, "was not changed");
+				}
 			});
 		}
 		else if (setting.keys){
@@ -189,8 +193,20 @@
 						container = setting.defaultValue;
 					}
 					container[key] = value;
-					setting.set(container, url);
-					logging.message("changed setting", setting.name, "(", key, "):", value);
+					if (setting.set(container, url)){
+						logging.message("changed setting", setting.name, "(", key, "):", value);
+					}
+					else {
+						container = setting.get(url);
+						keyType.updateCallback(
+							keyInput,
+							container && container.hasOwnProperty(key)?
+								container[key]:
+								setting.defaultKeyValue,
+							url
+						);
+						logging.message("setting", setting.name, "(", key, ") was not changed");
+					}
 				});
 				input.appendChild(row);
 			});

options/sanitationRules.js

@@ -279,5 +279,23 @@
 				}
 			}
 		},
+		{
+			name: "privacy",
+			check: function(errorCallback){
+				if (settings.sharePersistentRndBetweenDomains){
+					errorCallback({
+						message: browser.i18n.getMessage("sanitation_error.doNotSharePersistentRndBetweenDomains"),
+						severity: "high",
+						resolutions: [{
+							label: browser.i18n.getMessage("sanitation_resolution.disableFlag")
+								.replace(/{flag}/g, browser.i18n.getMessage("sharePersistentRndBetweenDomains_title")),
+							callback: function(){
+								settings.sharePersistentRndBetweenDomains = false;
+							}
+						}]
+					});
+				}
+			}
+		},
 	];
 }());

options/settingsDisplay.js

@@ -99,6 +99,22 @@
 				}
 			]
 		},
+		{
+			"name": "sharePersistentRndBetweenDomains",
+			"displayDependencies": [
+				{
+					"blockMode": ["fake"],
+					"rng": ["persistent"],
+					"displayAdvancedSettings": [true]
+				},
+				{
+					"blockMode": ["ask"],
+					"askDenyMode": ["fake"],
+					"rng": ["persistent"],
+					"displayAdvancedSettings": [true]
+				}
+			]
+		},
 		"notifications",
 		{
 			"name": "showNotifications"

releaseNotes.txt

@@ -8,6 +8,7 @@ Version 0.5.6:
 			- highlight "hide" icon when "tabing" to it
 			- made url specific values manageable with "tabing"
 		- added setting "protected canvas part" to decouple block mode from part
+		- added "share persistent randomness between domains"
 	
 	fixes:
 		- constant rng did not work properly when protecting input