App-Symbolfarbe von Betterbird in der Adressleiste von Firefox ändern

try {
    CustomizableUI.createWidget({
        id: "add-BB-app",
        label: "Betterbird",
        tooltiptext: "Betterbird Start",
        onCreated: btn => btn.image = "data:image/png;base64,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",
        onCommand: function(event) {
            var file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
            file.initWithPath("C:\\Program Files\\Betterbird\\betterbird.exe");
            if (file.exists()) file.launch();
        }
    });
} catch(e) {}

try {
    CustomizableUI.createWidget({
        id: "add-BB-app",
        label: "Betterbird",
        tooltiptext: "Betterbird Start",
        onCreated: btn => btn.image = "file:///C:/Users/User/AppData/Roaming/Mozilla\Firefox/Profiles/vo9u0wa6.default-release-1690616328947/chrome/icons",
        onCommand: function(event) {
			
            var file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
            file.initWithPath("C:\\Program Files\\Betterbird\\betterbird.exe");
            if (file.exists()) file.launch();
        }
    });
} catch(e) {}

try {
    CustomizableUI.createWidget({
        id: "add-BB-app",
        label: "Betterbird",
        tooltiptext: "Betterbird Start",
        onCreated: btn => btn.image = "file:///C:/Users/User/AppData/Roaming/Mozilla/Firefox/Profiles/vo9u0wa6.default-release-1690616328947/chrome/images/messengerWindow-bb-green.ico",
        onCommand: function(event) {
			
            var file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
            file.initWithPath("C:\\Program Files\\Betterbird\\betterbird.exe");
            if (file.exists()) file.launch();
        }
    });
} catch(e) {}