Fireclam Requires Restart
Use ClamAV to scan Firefox downloads for viruses.
BatchDownload Requires Restart
Like FlashGet's batch download,but special designed for some image site!
FireWebSSO Requires Restart
Secure remote storage of your personnal passwords, bookmarks and notes, crypted by your navigator. Auto-login, auto fill, auto detect authentication forms or HTTP-authentication, Single Sign-On, always synchronized with all your firefox navigators.
Status-Bar Custom Buttons Requires Restart
Create your own status-bar buttons.
ToggleReplied Requires Restart
Enables toggling of Replied/Forwarded states of messages.
Browser Backgrounds Requires Restart
Browser Backgrounds is the new Firefox extension that lets you install backgrounds directly on your browser.
MinimizeToTray For FF 3.5 Requires Restart
MinimizeToTray For firefox 3.Minimizes Mozilla windows into the system tray.Note:I am going to remove this extension if the original creator make a FF 3 version!
Spanish (Spain) ChatZilla Requires Restart
Spanish (es-ES) Language Pack for ChatZilla
Pretty-prints JSON content in the browser for easy, unobtrusive viewing.
FiltaQuilla Requires Restart
Adds many new mail filter actions - launch a file, suppress notification, remove star or tag, mark replied or unread, copy as "read", append text to subject.
Removes all the junk from New Google Reader and just gives you the search and collapsable subscriptions + favicons. By DemianGod
Also you can install the Script for GreaseMonkey.
Download from: http://userscripts.org/scripts/show/30242
ToneQuilla Requires Restart
Adds a new action to mail filters to allow playing a particular sound when the filter matches. Also includes several sample sound files.
JunQuilla Requires Restart
1) adds column with percent likelihood that a message is spam, 2) extends junk status column to show why a message was classified as junk/good, 3) adds an Uncertain folder for messages needing user decision.
Asks for the master password at startup (fixes multiple password prompt)
RequestPolicy Requires Restart
Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.
Bugmail Requires Restart
This extension adds bug status to the header pane. It currently supports Bugzilla, Trac, Flyspray and Launchpad.
ReloadPAC Requires Restart
Workaround for Bug 351163 (Thunderbird bypasses proxy.pac for first connection).
Tamil to Sinhala Transliteration Requires Restart
Transliterate Tamil selected text in to Sinhalese. When click on that text full transliterated text display as popup.
KeePass Helper Requires Restart
Adds a hostname, URL, or email account ID to the application's window name (e.g., that of Firefox or Thunderbird) to make it recognizable to password manager utilities like KeePass.