Add extensions, get work done

Record audio and video as webm, in real time.

Play YouTube™ Videos in Flash or HTML5 Player

Brings annotation support back to YouTube™!

Playback controls (with J and L) and timestamp on YouTube Shorts.

Convert Web Novels (and other web pages) into an EPUB for offline reading. Works with many sites, including: 1. ArchiveOfOurOwn.org 2. FanFiction.net. 3. royalroadl.com

Add a content menu Open with VLC on audio / video links. Links must contains file extensions (.mp4, .mkv, ...) Prerequisite : - VLC must be opened - HTTP web interface must be enabled (Settings > Interface > HTTP web interface)

Get a quick overview over all your ships/upgrades in your hangar and buyback, plan optimal upgrade chains. Also provides a searchable overview over all pledge store items.

Claims channel point bonuses automatically on Twitch.

Redirects all requests from wikis that have moved to wiki.gg from their former host.

Shows country flag based on the server location of the active tab's url

Skip ads, intros, credits and add adjust speed, etc. on Netflix, Prime video, Disney+, Crunchyroll and HBO max.

Pokémon Showdown extension that harnesses the power of parabolic calculus to strategically extract your opponents' Elo.

A new friend in every new tab.

Automatically set the videos' quality on YouTube according to their FPS!

Unwanted Twitch

Hide unwanted streams, games, categories, channels and tags on: twitch.tv

Encrypts Steam-Tradelink for Sparkles viewers

Provides control over Flash contents

chessvision.ai Chess Position Scanner

Analyze chess positions from any website, book, and video in Firefox

Enhanced Tooltip functionality for Pokémon Showdown Random Battle formats.

The YouTube Mp3 Downloader Add-on includes a Button on any YouTube Page and allows you to convert the YouTube Video to a Mp3 with just one click. Compatible with new Firefox Quantum 57