拡張機能はブラウザー向けのアプリのようなものです。
They add features to Firefox to make browsing faster, smarter, or just plain fun.
uBlock Origin
高効率ブロッカーが遂に登場。CPUとメモリーの負担を抑えます。
4,887,819 人のユーザー
Adblock Plus
広告やトラッキングで困っていませんか？ Adblock Plus でコントロールして自分好みに変えてしまいましょう。
10,602,234 人のユーザー
HTTPS Everywhere
Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.
539,791 人のユーザー
Impulse Blocker
Block distracting websites when you are browsing the web. You can list websites that you don't want to visit in the settings. You can pause or turn off the blocker quickly. Completely open source.
6,121 人のユーザー
Enhancer for YouTube™
YouTube™のユーザーエクスペリエンスを向上させる多数の機能。
503,470 人のユーザー
SoundFixer
Lets you fix annoying sound problems in YouTube videos and such. Like audio in one channel only, too quiet or too loud. (Unfortunately, doesn't work on many other websites because of cross-domain issues — but it does work on YouTube.com!)
14,692 人のユーザー
YouTube High Definition
YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.
196,491 人のユーザー
Video Speed Controller
Speed up, slow down, advance and rewind any HTML5 video with quick shortcuts.
31,344 人のユーザー
Wikiwand: Wikipedia Modernized
Good old Wikipedia gets a great new look
17,343 人のユーザー
Wikipedia Peek
Shows previews of linked articles on Wikipedia pages.
3,342 人のユーザー
Wikipedia Context Menu Search
Search for highlighted text on Wikipedia via the context menu.
2,934 人のユーザー
Random Unusual Wikipedia new tab
Redirects to a random unusual Wikipedia page when you open a new tab, because when you're opening a new tab you're looking for a distraction and that distraction might as well be a weird fact. Or show random Cognitive Bias, or Philosophical concept.
72 人のユーザー
ツリー型タブ (Tree Style Tab)
タブをツリー状に表示します。
129,519 人のユーザー
New Tab Override (WebExtension)
New Tab Override brings back the ability to change the page which is shown when opening a new tab.
105,620 人のユーザー
Tab Auto Refresh
Automatically refresh tabs based on custom time intervals
53,720 人のユーザー
OneTab
タブが多すぎてお困りですか？タブをリスト化してFirefoxの実行速度をスピードアップさせましょう OneTabが日本語でも利用可能になりました！
81,669 人のユーザー