Search and New Tab by Yahoo No Restart
This Add-on sets your default Search to Yahoo, and it brings a fresh look to every new tab page, powered by Yahoo.
Don't close last tab No Restart
This is a very simple addon that prevents browser to be closed when you are trying to close last tab (Like Opera 12 does). I wrote it to not change preferences manually every new browser installation. Everyone who wants can use it too.
Live Start Page LST No Restart
Live new tab page: living photos in your browser, weather, to-do list, and bookmark tiles
Automatically close unused tabs (keep only N most recent tabs).
Firefox in Full Screen mode with many extra options, such as optionally display the guides or for example the address bar. Saves the last state or force start in full screen forever! Simple and complete for this purpose.
Multi Links Plus lets you open, copy or bookmark multiple links at the same time rather than having to do them all individually.
open a list of urls at one time, for people who like to check several websites everyday
TabSubmit No Restart
Lets the user direct the submission of a form to a new tab or window. [Bug #17754]
Rename Tab Title No Restart
Renames the Tab Title (Persistent only for the session)
A quick button link to MusicWorldAnonymous.com. Music World Anonymous is a site about helping bands find fans for free!
Custom UserAgent String No Restart
Add a custom useragent string for desired URLs or domains.
Suspend Tab No Restart
Suspends background old tabs automatically to save memory usage.
newtab.url No Restart
Restores custom new-tab functionality ("browser.newtab.url" - like)
Open in IE™ (Internet Explorer) No Restart
Open links in Internet Explorer
TabTrekker - New Tab Page No Restart
Explore the world one tab at a time.
Tab Reloader (Page Reloader) No Restart
An easy-to-use tab reloader with custom reloading time settings for individual tabs
Pin Unpin Tab No Restart
Pin or unpin current tab through new, cooler ways:
1. Customizable keyboard shortcut. Default is Alt-P
2. Firefox Developer Command line -> 'pintab' & 'unpintab'
UPDATE: Commands don't work anymore. They are disabled from version 1.0.
Proxy Privacy Ruler No Restart
Restrict Proxy by Private Windows, Tabs and Domain List