Awesome

Firefox extensions

Please read contribution guidelines before contributing.

Awesome Autocomplete For Github - Adds autocomplete for GitHub's search bar.
Lovely Forks - Shows notable forks of GitHub repositories under their names.
OctoLinker - Lets you navigate through projects on GitHub by making references in code clickable.
Octotree - Gives a file tree view on the side of each repository that you visit that you can use to navigate over the codebase.
React Developer Tools - Adds React debugging tools to Chrome Dev tools.
Redux Devtools - Adds debugging for Redux to Chrome Dev tools.
Sourcegraph for GitHub - Allows you to quicky open any GitHub repository to view in a more powerful Sourcegraph editor.

1Password - Extension for 1Password app. If you want a UI friendly password manager, use it. Otherwise check Bitwarden.
Bitwarden - Secure and free password manager for all of your devices. Source code is available here. Note: For more security conscious viewpoint use Bitwarden.
ClearURLs - Automatically remove tracking elements from URLs to help protect your privacy when browsing through the Internet. ClearURL's source code is available here.
Dark Reader - Inverts brightness of web pages and aims to reduce eyestrain while browsing the web.
Decentraleyes - Improves privacy by intercepting requests to large third-party CDNs (more info).
Disconnect - Adds an extra layer of security on top of uBlock Origin.
NoScript - The best security you can get in a web browser! Used for protection against XSS and other web security exploits. Source code is available here.
Reddit Enhacement Suite - Includes many features that enhances your Reddit browsing experience.
Stylus - Easily install themes and skins for many popular sites.
Tab search - Keyboard-accessible tab management.
Tridactyl - Vim like keyboard navigation like Vimperator/Pentadactyl.
Vim Vixen - Accelerate your browsing with Vim power.
uBlock Origin - Probably the best adblocker for Firefox there is.