Top-Rated Extensions

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MonkeyMenu Requires Restart

MonkeyMenu brings some of the features of the MenuX Firefox extension to the Seamonkey browser. You can add about 29 buttons to the Seamonkey user interface, collapse any toolbar, add/remove search engines, have your font zoom size reloaded, and...

Rated 4 out of 5 stars (12)
5 users

FoxyProxy Basic Requires Restart

FoxyProxy Basic is a simple on/off proxy switcher. More advanced features and configuration options are offered by FoxyProxy Standard.

Rated 4 out of 5 stars (31)
21,589 users

AutoPager Fixed Requires Restart

AutoPager Fixed is a working version of AutoPager extension for Firefox 36+ (non-E10s mode) to autoload the next page(s) when you scroll pages.

ATTENTION: DISABLE THE ORIGINAL AUTOPAGER ADDON!

Rated 4 out of 5 stars (68)
11,371 users

YouTube Video Download & Convert

YouTube Video Download and Convert is the powerful add-on that lets you collect all media information available on YouTube. Advanced power panel lets you download, preview, play with and convert all media right inside Firefox.

Rated 4 out of 5 stars (4)
50,110 users

BatchDownload Requires Restart

Like FlashGet's batch download,but special designed for some image site!

Rated 4 out of 5 stars (28)
6,398 users

Cert Viewer Plus Requires Restart

Certificate viewer enhancements: PEM format view, trust configuration

Rated 4 out of 5 stars (6)
4,334 users

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.

Rated 4 out of 5 stars (5)
3 users

Slashy Requires Restart

Fixes Windows backslash file separators in links and images and other types.

Rated 4 out of 5 stars (5)
559 users

Bitdefender QuickScan Requires Restart

The quickest way to find out if your computer is infected!
Bitdefender QuickScan is a very fast antivirus scanner, able to determine in a matter of seconds if a system is infected with malware.
More on http://quickscan.bitdefender.com/faq

Rated 4 out of 5 stars (60)
78,678 users

Free Memory Button

Free unused memory that Firefox is currently using.

Rated 4 out of 5 stars (6)
6,695 users

User Agent Changer Requires Restart

Adds a menu and a toolbar button to change the user agent of a browser.

Rated 4 out of 5 stars (6)
2,434 users

Proxy Tool Requires Restart

Proxy Tool - Powerful, yet User-friendly proxy tool to manage your proxies and anonymity needs, including: 46M+ user agents (world's largest), 10 different spoofed HTTP referrers, auto-proxy rotation, plus many more. Developed by http://ProxyList.co

Rated 4 out of 5 stars (40)
147,561 users

Download Timestamp Requires Restart

Sets downloaded file's modification time to current time in Firefox 4.0 and SeaMonkey 2.1.

Rated 4 out of 5 stars (7)
1 user

Awesome ldapInfoShow

Show contact photo and other info from Local Dir, Addressbook, LDAP, Facebook, LinkedIn, Flickr, Gravatar etc

Rated 4 out of 5 stars (10)
1,698 users

MR Tech Link Wrapper Requires Restart

Wraps long links and lines to spare you from having to scroll left and right...

Rated 4 out of 5 stars (9)
79 users

Folderpane Tools Requires Restart

Allows for customization of the folder pane. Accounts can be rearranged and the startup folder can be chosen.

Rated 4 out of 5 stars (122)
31,868 users

Gmail Manager Requires Restart

The original Gmail notifier for multiple accounts. Allows you to receive new mail notifications along with viewing account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets.

Rated 4 out of 5 stars (1,345)
65,215 users

Galaxytoolbar Requires Restart

A Firefox extension for the OGame Galaxytool to keep it up-to-date.

Rated 4 out of 5 stars (15)
2,029 users

Filter Uploader for Adblock Plus (unofficial) Requires Restart

DOES NOT BLOCK ADS! Don't install this add-on if you don't know what 'uploading' means!

This add-on Uploads the filters from your Adblock Plus installation to a FTP, HTTP, HTTPS server...

Rated 4 out of 5 stars (40)
12,369 users

Yahoo! Mail Notifier Requires Restart

This extension notifies you when new messages arrive in your Yahoo mailbox.

Rated 3 out of 5 stars (183)
6,450 users