Skip to main contentSkip to site search Messenger & Notifier for Facebook is an easy way to check Facebook Messenger from your desktop machine. Clicking on the toolbar icon, renders messenger.com in a small UI attached to the toolbar popup. Sidebar for Facebook brings Facebook right into your Firefox Sidebar. Get notifications, status and photos from the left sidebar of Firefox instantly. Facebook Notifier is a browser extension that displays your Facebook notifications unread count. Allows Facebook Messenger to run as a sidebar. Talk to your friends while browsing the web. The sidebar is visible on all tabs. Messenger for Facebook lets you bring Facebook Messenger right into your browser to chat with your friends.