Added protection for navigator.storage.estimate()

Fixes #681

lib/modifiedNavigatorAPI.js

@@ -12,7 +12,7 @@
 		scope = require.register("./modifiedNavigatorAPI", {});
 	}
 	
-	const {checkerWrapper, setGetterProperties, getStatusByFlag} = require("./modifiedAPIFunctions");
+	const {checkerWrapper, setProperties, getStatusByFlag} = require("./modifiedAPIFunctions");
 	const extension = require("./extension");
 	const navigator = require("./navigator");
 	
@@ -55,7 +55,40 @@
 		};
 	});
 	
-	setGetterProperties(scope.changedGetters, {
+	scope.changedFunctions = {
+		estimate: {
+			objectGetters: [function(window){return window.StorageManager && window.StorageManager.prototype;}],
+			fakeGenerator: function(checker){
+				const quota = 10 * 1024 * 1024 * 1024;
+				return function estimate(){
+					return checkerWrapper(checker, this, arguments, function(args, check){
+						const {notify, original, window} = check;
+						const This = this;
+						return new window.Promise(async function(resolve, reject){
+							try {
+								const originalValue = await original.call(This, ...args);
+								if (originalValue.quota !== quota){
+									originalValue.usage = Math.min(
+										quota,
+										Math.max(0, quota - (originalValue.quota - originalValue.usage))
+									);
+									originalValue.quota = quota;
+									
+									notify("fakedNavigatorReadout");
+								}
+								resolve(originalValue);
+							}
+							catch (error){
+								reject(error);
+							}
+						});
+					});
+				};
+			}
+		}
+	};
+	
+	setProperties(scope.changedFunctions, scope.changedGetters, {
 		type: "readout",
 		getStatus: getStatusByFlag("protectNavigator"),
 		api: "navigator"

lib/settingDefinitions.js

@@ -146,6 +146,7 @@
 				"appName @ navigator",
 				"appVersion @ navigator",
 				"buildID @ navigator",
+				"estimate @ navigator",
 				"oscpu @ navigator",
 				"platform @ navigator",
 				"product @ navigator",

releaseNotes.txt

@@ -5,6 +5,7 @@ Version 1.10:
 	new features:
 		- added setting showPresetsOnInstallation to be able to not show the presets page upon installation
 		- display version in page and browser action
+		- added protection for navigator.storage.estimate()
 	
 	fixes:
 		- always protect about:blank