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.
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.
553,108 人のユーザー
Google Search Fixer
Override the user-agent string presented to Google Search pages to receive the search experience shown to Chrome.
8,339 人のユーザー
Ghostery – プライバシー広告ブロッカー
Ghosteryは強力なプライバシー拡張機能です。 広告をブロックし、トラッカーを阻止し、ウェブサイトを高速化します。
1,176,051 人のユーザー
Video Background Play Fix
Some sites may not work with Firefox for Android video background play feature. This add-on provides a quick fix by blocking the Page Visibility API and the Fullscreen API.
27,455 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。
513,894 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!)
14,190 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.
201,708 人のユーザー
Video Speed Controller
Speed up, slow down, advance and rewind any HTML5 video with quick shortcuts.
32,084 人のユーザー
Wikiwand: Wikipedia Modernized
Good old Wikipedia gets a great new look
17,806 人のユーザー
Wikipedia Peek
Shows previews of linked articles on Wikipedia pages.
3,396 人のユーザー
Wikipedia Context Menu Search
Search for highlighted text on Wikipedia via the context menu.
3,007 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.
71 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.
110,342 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。
135,202 人のユーザー
Tab Auto Refresh
Automatically refresh tabs based on custom time intervals
56,241 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！
84,312 人のユーザー