Extensions by Weekly Downloads

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Adblock Plus

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 (5,631)
640,862 weekly downloads

uBlock Origin Featured

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

Rated 5 out of 5 stars (2,165)
242,916 weekly downloads

Privacy Badger Compatible with Firefox 57+

Protects your privacy by blocking spying ads and invisible trackers.

Rated 4 out of 5 stars (169)
183,342 weekly downloads

Flash Video Downloader - YouTube HD Download [4K]

Flash Video Downloader helps you download any video (flv, mp4, HD) from YouTube, 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 (2,493)
91,860 weekly downloads

AdBlock for Firefox Compatible with Firefox 57+

The most popular ad blocker for Chrome and Safari, now available for Firefox! Block all advertisements on all web pages, even Facebook, Youtube, and Hulu. Browse faster, too! Most ads aren't even downloaded at all, saving you time and bandwidth.

Rated 4 out of 5 stars (128)
79,578 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 (2,098)
67,138 weekly downloads

Hoxx VPN Proxy

Hoxx VPN Proxy service to unblock blocked websites, hide your location and encrypt your connection. Completely free.

Rated 5 out of 5 stars (2,944)
59,699 weekly downloads

Awesome Screenshot Plus - Capture, Annotate & More Compatible with Firefox 57+

Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. And more!

Rated 4 out of 5 stars (1,561)
50,790 weekly downloads

Download Youtube Video Compatible with Firefox 57+

Save video from any Youtube video in High definition HD or Standard definition SD.

1-click download any video directly from Youtube.

Choose if you want .mp4, .webm, mobile, or audio only (audio only saves space and great for mobile devices)

Rated 4 out of 5 stars (132)
44,676 weekly downloads

Easy Youtube Video Downloader Express Compatible with Firefox 57+

"Best Youtube Video Downloader", Only one with 1080p Full-HD and 256kbps MP3 Direct Links. A clean, fast and simple addon for superfast and easy downloads in FLV, 3GP, MP3, MP4, 720p, 1080p qualities on Youtube pages.

Rated 4 out of 5 stars (1,260)
40,852 weekly downloads

LanguageTool Grammar Checker Compatible with Firefox 57+

With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.

Rated 4 out of 5 stars (21)
40,681 weekly downloads

AdBlocker Ultimate Compatible with Firefox 57+

Free and improved ad blocker. Completely remove ALL ads. No "acceptable" ads or whitelisted advertisers, block tracking, block malware!

Rated 5 out of 5 stars (2,082)
39,332 weekly downloads

Video Downloader professional Compatible with Firefox 57+

- download and save videos embedded into a website to your hard disk
- add youtube, vimeo and other videos easily to your video list
- supports up to 4k videos

Rated 4 out of 5 stars (824)
38,860 weekly downloads

Download with Internet Download Manager Compatible with Firefox 57+

when activated, interrupts the built-in download manager to direct links to IDMan (Internet Download Manager)

Rated 4 out of 5 stars (100)
33,247 weekly downloads

Grammarly for Firefox Compatible with Firefox 57+

Grammarly will help you communicate more effectively. As you type, Grammarly flags mistakes and helps you make sure your messages, documents, and social media posts are clear, mistake-free, and impactful.

Rated 4 out of 5 stars (209)
31,072 weekly downloads

HTTPS Everywhere Requires Restart

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 (223)
28,526 weekly downloads

1-Click Downloader (Video or Photo) Compatible with Firefox 57+

Click to download any Youtube, Instagram, Facebook, Vid.me, Streamable, LiveLeak, Vine video or photo.

Rated 5 out of 5 stars (94)
26,969 weekly downloads

AdBlocker for YouTube™ Compatible with Firefox 57+

Removes all annoying Ads from YouTube

Rated 4 out of 5 stars (74)
17,240 weekly downloads

Stylish Requires Restart Featured

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

Rated 4 out of 5 stars (876)
16,385 weekly downloads