Change Firefox from Great to Amazing, use All in one sidebar Add-on

All in one Sidebar(AioS) is a Firefox Add-on, that is just more than a Add-on. It completely changes the way you browse the web.

It allows us to quickly switch between sidebars and view dialog boxes. It has 6 basic icons to switch from bookmarks, downloads, History, Extensions and view source code of a page as well. It has a slide out bar, which is customizable. This add-on truly goes by its name with providing all sort of information that is required. It can be kept hidden while browsing, and can come into action with just a simple Mouse-roll.

AioS

You can also use Hotkeys to control and switch the tab. All in all, this is a complete time saver, without even interrupting you while browsing., a must have add-on.