All-in-One Sidebar by Ingo Wennemaring

ATTENTION!

The development of this extension has been discontinued. The All-in-One Sidebar will stop working in November 2017 with the release of Firefox 57. Please read my statement on the website.

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The award-winning All-in-One Sidebar (AiOS) extends the sidebar of Firefox with many useful features:

• open Bookmarks, History, Downloads, Add-ons, Page Info, and Error Console in the sidebar
• fully customizable toolbar at the left side of the browser
• quickly show/hide the sidebar and the toolbar with a thin switch
• toggle the sidebar by clicking or just by mouse movements
• all panels are optimized for displaying in the sidebar (including slim lists)
• place the sidebar on the left or on the right side of the browser
• configure the behavior at the browser start or in fullscreen mode
• MultiPanel for opening webpages in the sidebar, amongst other features
• configurable shortcuts and additional buttons
• third-party add-ons are supported
• can be extensively customized

And many other useful features ...

Learn more - http://firefox.exxile.net/aios/features.php
See more - http://firefox.exxile.net/aios/screenshots.php

Follow me on Twitter - http://twitter.com/AddonLab

PROBLEMS / BUGS

The source code of AiOS is hosted on GitHub. You can contribute or make use of the issue system to report bugs.
https://github.com/AddonLab/AiOS

Please check if a bug is already reported before you open a new report. And please write meaningful reports with as much details as possible. I can't fix bugs which are not reproducible.