User-Agent Switcher and Manager
Spoofs User-Agent strings of your browser with a new one globally, randomly or per hostname
14,904 users
Iridium for YouTube
YouTube with more freedom
19,626 users
Enhancer for YouTube™
Tons of features to improve your user experience on YouTube™.
359,670 users
Tab2QR
Send the page you are currently viewing to your mobile device. QR codes are generated instantly in browser and never leave your computer. Implemented with WebExtensions API and compatible with Firefox 57+.
6,353 users
Privacy Possum
Privacy Possum monkey wrenches common commercial tracking methods by reducing and falsifying the data gathered by tracking companies.
98,915 users
Privacy Badger
Automatically learns to block invisible trackers.
560,871 users
Facebook Container
Prevent Facebook from tracking you around the web. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook.
311,962 users
Cookie AutoDelete
Control your cookies! This WebExtension is inspired by Self Destructing Cookies. When a tab closes, any cookies not being used are automatically deleted. Whitelist the ones you trust while deleting the rest. Support for Container Tabs.
140,811 users
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).
11,421,545 users
uBlock Origin
Finally, an efficient blocker. Easy on CPU and memory.
4,831,992 users
Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
3,154,260 users
Easy Screenshot
Capture a screenshot of the whole webpage, and save in your desktop in default.
2,502,498 users
Porn/Malware Blocker
Blocks known pornographic and malware domains. When attempting to go to such a domain, the user is redirected to another page, alerting them that the site has been blocked. Unlike other extensions, no content from the blocked site is ever shown.
7,313 users
Block Site
A customizable password protected website blocker and redirector
4,887 users
Parental Control: Family Friendly Filter
Family Friendly browser protection add-on is a content filter to block sites containing pornography and any other kind of inappropriate material.
6,365 users
FoxFilter
Recently called "THE Parental Control for Firefox"! FoxFilter is a personal content filter that helps block pornographic and other inappropriate content. All filtering features are free! Premium features available with small support fee.
15,091 users