Für - Firefox Translations - habe ich mal ein Script umgebaut, so dass das Menü about:translations über einen Button aufrufbar wird.
.... der Button 
....das Menü 
..danke Dharkness
...das Script
Code
// abouttranslations-button.uc.js
(function() {
if (location != 'chrome://browser/content/browser.xhtml') return;
try {
CustomizableUI.createWidget({
id: 'abouttranslations-ToolBarButton',
type: 'custom',
defaultArea: CustomizableUI.AREA_NAVBAR,
onBuild: function(aDocument) {
var toolbaritem = aDocument.createElementNS('http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul', 'toolbarbutton');
var props = {
id: 'abouttranslations-ToolBarButton',
class: 'toolbarbutton-1 chromeclass-toolbar-additional',
label: 'About:Translations',
tooltiptext: 'About:Translations',
style: 'list-style-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAACBklEQVQ4jZWSv2tTURzFz/e+9/wDSg11cWicLO89qVgqGqGQvBcJDh1aCDhkM9pCoFNwKUS07SZK0ryEUiik7aBDdCgKOrRjwUG6hEKhVhGj1AdSf4BwHBJC0vcyeOA7XO73+7nn3nOBthzPXHA8y3crFh3P8h3PXMD/yPEsP1aK8lppmLFilI5n+SFtKcMwqJR6Hwqw1yO0NiK0NyL9ACVd16npOgGcDwCsrUGarwZobQ2GATSlVFMEdU3TCCAfAIxtD/HKzhDHts+FAa63BzMQ2QewEwDEd6OMvxtmfDf0DR5rShHABQCrAvztuYbjWf7Uns3phs3pPTsAEJFDpRRFhKKEIkIAd3sAdw5ivPfhBrMHsdOAy6KEAHLt9RkAnwG87gHkP6V4/8st5j+m+qXQX45n+Q+baS59v81HzXQAYBgGO6Xr1HWDAAC3PJJ0PbPuViw+PZ5h+UeOT45n6FYsup5Zd8sjyVNnXdQ0zReRlv1k1eZiI8vaz0K7HrB2UmDtpMClRpbJqk1MQWsPD4iSfVFyCOBsx0FqZZTVo3m++FXsVPVonqmVUXY50AC8UUr9AXC1x1Ni2cxMro3z+dci3/5e57NvRU6ujTOxbGa62kqq9Q9yCFOibM6lNyf4srnK9OYEE2VzrntfKUUlrfxFQBEQQG9SrmfO3qxeouuZs+FZBfUPodn4c9fQC9EAAAAASUVORK5CYII=)',
onclick: 'if (event.button == 0) { \
openTrustedLinkIn("about:translations", "tab");\
}; '
};
for (var p in props)
toolbaritem.setAttribute(p, props[p]);
return toolbaritem;
}
});
} catch(e) { };
})();
