Top-Rated Extensions


UnMHT No Restart

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Rated 5 out of 5 stars (217)
84,321 users

Toggle Mixed Active Content No Restart

An icon that toggles the preference of blocking mixed active content.
Preference Name: security.mixed_content.block_active_content

Rated 5 out of 5 stars (7)
4,316 users

Clean Links No Restart Featured

Converts obfuscated or nested links to genuine clean links.


Rated 4 out of 5 stars (101)
38,582 users

PriceBlink - Automatic Price Comparison & Coupons No Restart Featured

**About 2012 Reader’s Choice Award: Best Browser Addon**

Automatically finds lower prices and money-saving coupons from thousands of retailers while you shop. PriceBlink stays hidden until you are shopping. US and UK.


Rated 4 out of 5 stars (102)
21,543 users

Transmission easy client No Restart

Transmission easy client - это дополнение позволяет легко интегрировать Transmission в браузер!

Rated 5 out of 5 stars (10)
833 users

Silent Block

Minimum and fast URL blocker by regular expression.

Rated 5 out of 5 stars (19)
10,031 users

Simple YouTube to MP3/MP4 Converter and Downloader No Restart

Download youtube videos as mp3/mp4/ogg/webm fast and easy! Adding mirrors everyday to decrease any downtime! We monitor comments and work to fix any problems as soon as possible!

Rated 5 out of 5 stars (15)
58,221 users

Lightweight Themes Switcher No Restart Featured

Change the Lightweight Themes easily from the menu.

Rated 5 out of 5 stars (15)
2,647 users

Skip skip!! No Restart

This addon allows you to skip automatically advertising
Basically when the page loads the site with various advertisements, the add-on does go directly to the site you want, but waiting a few seconds.
It is compatible with Android.

Rated 5 out of 5 stars (6)
6,001 users

WhimsyPro No Restart

Add some Whimsy to your Firefox! (Pro Version, unregistered)

Rated 5 out of 5 stars (5)
283 users

Site Searcher No Restart

Adds a "Search this site" button to Firefox. When clicked, Google will be opened and search the website you are on.

Rated 5 out of 5 stars (8)
1,679 users

Google Search Link Fix for Mobile and Desktop No Restart

Fix the Google Search result links.

Rated 5 out of 5 stars (11)
2,447 users

Textmarker No Restart

Highlighter with different colors, saving options, customizable highlight styles and undo/redo functionality.
Select some text, press M - done.
Changes can be stored in textMarker history for later visits.

Rated 5 out of 5 stars (15)
1,466 users

Click-to-Play Manager No Restart

Manages the Click-to-Play domain whitelist.

Rated 5 out of 5 stars (10)
3,882 users

HTTPS Everywhere

Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.

Rated 4 out of 5 stars (33)
64,024 users

YouTube Embed2Link No Restart

This addon converts embeded videos into links to the video on YouTube. Great for mobile deivces so you can watch the video in the YouTube app.

Rated 5 out of 5 stars (13)
3,899 users

about:addons-memory No Restart

Adds an about:addons-memory page that details add-on memory usage

Rated 4 out of 5 stars (91)
38,757 users

µBlock No Restart

Finally, an efficient blocker. Easy on CPU and memory.

Rated 4 out of 5 stars (212)
222,138 users

Smart Referer No Restart

Send referers only when staying on the same domain.

You can whitelist domains with wildcards and configure other things, look in the preferences page of the addon in the addon manager.

Rated 4 out of 5 stars (28)
8,648 users

Flash Video Downloader - YouTube HD Download [4K]

Flash Video Downloader helps you to download any video (flv, mp4, HD) from YouTube-like, Facebook, Break, Metacafe and more in one click. You can download mp3, music (iPod), avi and more. Download Flash games. Download Helper. 4K download

Rated 4 out of 5 stars (539)
1,135,358 users