[SOLVED] Install multiple versions of Firefox on Ubuntu

• Download desired firefox version here https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/
• Extract it to e.g. /opt/firefox2/

Source: http://www.wikihow.com/Install-multiple-versions-of-Firefox-on-Ubuntu

My Firefox extensions list

Generated: Sat Nov 07 2009 01:05:09 GMT+0100

User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5 GTB5 (.NET CLR 3.5.30729)

Build ID: 20091102152451



Enabled Extensions: [45]

• Adblock Plus 1.1.1


• Addictive Typing Lessons 3.0


• BugMeNot 2.2


• Chrome List 0.4.1


• CLEO 4.3


• ColorfulTabs 3.9.7


• ColorZilla 2.0.2.1


• Console² 0.5


• Deepest Sender 0.9.1


• Delicious Bookmarks 2.1.072


• DownloadHelper 4.6.4


• DownThemAll! 1.1.7


• Echofon 1.9.3


• Extension Developer 0.3.0.20090902


• FaviconizeTab 0.9.8.2


• FEBE 6.3


• Firebug 1.4.5


• Firecookie 0.9.1


• Google Icon 1.11


• Google Toolbar for Firefox 5.0.20090813W


• Greasemonkey 0.8.20090920.2


• Html Validator 0.8.5.8


• InspectorWidget 2.11.20090429


• Jetpack 0.6


• LastTab 2.1.2


• LiveJournal Addons 8.7.3


• MeasureIt 0.3.9


• Microsoft .NET Framework Assistant 1.1


• MR Tech Toolkit 6.0.3.4


• NoScript 1.9.9.14


• PDF Download 3.0.0.1


• Pearl Crescent Page Saver Basic 2.5


• Personal Menu 4.2.1


• Read it Later 0.9948


• ReloadEvery 3.5.1


• Server Spy 0.1.6


• Server Switcher 0.5


• Sxipper 2.2.3


• Tab Progress Bar 0.6


• Tab Scope 0.2.2.13


• Tabs Open Relative 0.4


• Test Pilot 0.3


• Transliterator 0.7.4


• Web Developer 1.1.8

 

Firefox: Tab Scope

"Shows a popup on tabs and enables you to preview and navigate tab contents through popup. Major features are:

* Real-time preview of tab contents
* Navigate (Back/Forward/Reload/Stop) through popup
* Scroll pages or frames in preview with mouse wheel
* Click links or buttons directly in preview" addons.mozilla.org

Firefox: FaviconizeTab

"This extension adds a new "FaviconizeTab" option to the context menu of the tab.
When it is clicked, The width of the tab becomes small up to the size of favicon.
It returns to the former size when "FaviconizeTab" is clicked again." addons.mozilla.org