Midnight Lizard
This extension changes page colors, brightness and contrast to increase readability and brings dark night mode to all websites.
3,777 users
Ecosia — The search engine that plants trees!
Ecosia is a search engine that uses 80% of its profits from ad revenue to plant trees. By searching with Ecosia you can help the environment for free. This extension adds Ecosia.org as the default search engine to your Firefox browser. Give it a try!
274,029 users
Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
3,051,788 users
User-Agent Switcher and Manager
Spoofs User-Agent strings of your browser with a new one globally, randomly or per hostname
14,465 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.
304,351 users
Privacy Badger
Automatically learns to block invisible trackers.
545,451 users
Privacy Possum
Privacy Possum monkey wrenches common commercial tracking methods by reducing and falsifying the data gathered by tracking companies.
97,985 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.
138,314 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).
11,022,112 users
uBlock Origin
Finally, an efficient blocker. Easy on CPU and memory.
4,678,790 users
Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
3,051,788 users
Easy Screenshot
Capture a screenshot of the whole webpage, and save in your desktop in default.
2,320,929 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.
7,477 users
Block Site
A customizable password protected website blocker and redirector
4,869 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.
6,151 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.
14,658 users