Firefox Add-ons
Open Add-ons Manager from the menu or use Crtl+Shift+A
Theme
Dark theme featuring a white border surrounding the active tab, enhancing its visibility, especially when multiple fans are open.
Cleans up and customize Facebook. It filters out the junk you don’t want to see, leaving behind the posts and page elements you do wish to see. The list of story types that FBP hides is customizable to your taste.
Prevent Facebook from tracking you around the web and helps you take control and isolate your web activity from Facebook.
Security
Strictly block all popup requests from any website by default. A notification window is opened to allow you accept, reject, open the popup in background page, or redirect the current page to popup address.
Removes tracking elements from URLs.
Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.
User-Agent Switcher and Manager
Spoof websites trying to gather information about your web navigation – like your browser type and operating system – to deliver distinct content you may not want.
Alters some JS APIs to prevent fingerprinting.
Privacy
By installing these three add-ons, you can effectively eliminate ads from both web browsing and YouTube videos.
Simple and seamless privacy protection for your browser: tracker blocking, cookie protection, DuckDuckGo private search, email protection, HTTPS upgrading, and much more.
The fastest and safest web browsing experience. Secure your privacy by blocking trackers, blocking ads, and blocking malicious content.
Automatically learns to block invisible trackers.
Cookies
Control your cookies! When a tab closes, any cookies not being used are automatically deleted. Keep the ones you trust (forever/until restart) while deleting the rest. Containers supported.
Get rid of cookie warnings from almost all websites!