Extensions by Weekly Downloads

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Adblock Plus No Restart

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (4,913)
1,327,472 weekly downloads

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 (551)
145,497 weekly downloads

uBlock Origin No Restart Featured

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

Rated 5 out of 5 stars (140)
74,667 weekly downloads

Ghostery No Restart Featured

Protect your privacy. See who's tracking your web browsing and block them with Ghostery.

Rated 5 out of 5 stars (1,165)
71,831 weekly downloads

Adblock Edge No Restart

Adblock Edge is a fork of the Adblock Plus version 2.1.2 extension for blocking advertisements on the web, without sponsored ads whitelist.

**This addon has been discontinued**

Rated 5 out of 5 stars (278)
45,303 weekly downloads

Open With Google Chrome No Restart

Open With Google Chrome sends pages from Mozilla Firefox to Google Chrome.

Rated 5 out of 5 stars (5)
38,636 weekly downloads

LastPass Password Manager Featured

LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.

Rated 4 out of 5 stars (1,215)
29,971 weekly downloads

Stylish Featured

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.

Rated 4 out of 5 stars (743)
28,095 weekly downloads

Youtube Downloader 4K - Video Downloader

Download from YouTube 4K videos and thousands other video websites.

Rated 4 out of 5 stars (12)
27,043 weekly downloads

Location Guard No Restart

Hide your geographic location from websites. Report a fake location with the addition of random noise in order to protect your privacy. Per site settings with three configurable levels of accuracy or even the possibility to use a fixed location.

Rated 4 out of 5 stars (16)
22,255 weekly downloads

SaveFrom.net helper all-in-1 / youtube downloader No Restart

SaveFrom.net helper will enable you to download files from YouTube.com, FaceBook.com, Vimeo.com, Daylimotion.com, VK.com, Odnoklassnoki.ru, Soundcloud.com and more than 40 other just in one click.

Rated 4 out of 5 stars (190)
19,703 weekly downloads

µBlock No Restart

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

Rated 4 out of 5 stars (199)
17,902 weekly downloads

Video WithOut Flash No Restart

Watch videos without flash

Rated 4 out of 5 stars (50)
14,854 weekly downloads

Bluhell Firewall No Restart Featured

Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.

Rated 5 out of 5 stars (229)
13,955 weekly downloads

Phony No Restart Featured

View mobile or desktop versions of sites, by impersonating other browsers' useragent headers.

Rated 4 out of 5 stars (82)
11,704 weekly downloads

Self-Destructing Cookies No Restart

Fix the web. Gets rid of a site's cookies and LocalStorage as soon as you close its tabs. Protects against trackers and zombie-cookies. Trustworthy services can be whitelisted.

Rated 4 out of 5 stars (413)
10,361 weekly downloads

HTML5 Video Everywhere! No Restart

Replace video player with Firefox native video player

Rated 4 out of 5 stars (36)
9,838 weekly downloads

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 4 out of 5 stars (13)
6,181 weekly downloads

Privacy Settings No Restart

Alter Firefox's built-in privacy settings easily with a toolbar panel.

Rated 5 out of 5 stars (16)
4,748 weekly downloads

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 (213)
4,448 weekly downloads