Awesome Browser Extensions

A curated list of browser's extensions.

Inspired by the Awesome thing.

Knowledge

[Chrome/Firefox] 30 Seconds of Knowledge: Get a random code snippet on each 'new tab', from different coding categories, that you can read and understand in 30 seconds or less.

[Chrome] Clutter Free: Automatically detect and prevent duplicate tabs, offering quick tab search & switch.
[Chrome] Sortify: Organize your browser tabs by site or time.
[Chrome/Safari] Toast: Simple and lightweight extension that allows you to save all tabs in the open window. This way you can easily switch from project to project or between work and home tabs.

[Chrome] GitHub Dark Theme: A Dark theme for all of GitHub based on Atom One Dark.
[Chrome/Safari/Opera/Baidu] Stylish - Custom themes for any website: Stylish lets you customize any website with custom user styles (themes for websites). Choose from the largest userstyles library to change the color scheme, background, and skin for Google, Facebook, YouTube and many, many more sites.

[Chrome] Chrome Regex Search: Highlight regex matches on the web page dynamically as you type.
[Chrome] FIO - Figure it out: Beautifully displays time zones you chose on every 'new tab', allowing for quick checks, and easy time zone math.
[Chrome] Magnetify: Open all Spotify links in your desktop app instead of the web player.
[Chrome/Firefox/Safari] Shut Up: Comment Blocker: Hides comments from websites.
[Chrome] Video Speed Controller: Speed up, slow down, advance and rewind HTML5 audio/video with shortcuts