Dark Reader
すべてのウェブサイトにダークテーマを適用します。夜間や毎日のブラウジングにDark Readerを使用し、あなたの目を気遣います。
1,160,152 人のユーザー
AdGuard AdBlocker
AdGuardは、広告やポップアップ対処には比類のない広告ブロック拡張機能です。Facebook、YouTubeやその他のサイトで広告をブロックします。
1,061,243 人のユーザー
Return YouTube Dislike
Returns ability to see dislike statistics on youtube
669,543 人のユーザー
YouTube High Definition
YouTube High Definition is a powerful tool that automatically plays all YouTube videos in HD, changes video player size, offers auto-stop and mute, and much more.
162,696 人のユーザー
EPUBReader
Read ePub files right in Firefox. No additional software needed!
132,565 人のユーザー
Simple Tab Groups
Create, modify, and quickly change tab groups
80,705 人のユーザー
Tabliss - New Tab
A beautiful New Tab page with many customisable backgrounds and widgets that does not require any permissions.
72,346 人のユーザー
LeechBlock NG
LeechBlock NG is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.
68,560 人のユーザー
パスワード管理 ロボフォーム
ロボフォームはパスワードを安全に保管してウェブサイトへのログインを自動化する世界最強クラスのパスワード管理システムです。
62,789 人のユーザー
Dictionary Anywhere
View definitions easily as you browse the web. Double-click any word to view its definition in a small pop-up bubble. It also supports Spanish, German, French language alongside English. Enjoy Reading Uninterrupted!!!.
41,518 人のユーザー
SoundFixer
Helps you fix annoying sound problems on sites like YouTube: audio in one channel only, too quiet or too loud. (Unfortunately, this extension does not work on all websites because of cross-domain issues — but it does work on YouTube!)
36,391 人のユーザー
Tomato Clock
Tomato Clock is a simple browser extension that helps with online time management.
35,913 人のユーザー
Foxy Gestures
Mouse gestures for Firefox. A web extension alternative to FireGestures created by a long time FireGestures user.
21,697 人のユーザー
Link Gopher
Extracts all links from web page, sorts them, removes duplicates, and displays them in a new tab for inspection or copy and paste into other systems.
15,952 人のユーザー
Default Bookmark Folder
Allows you to choose the default bookmark location folder and quickly bookmark pages via a dedicated icon.
13,965 人のユーザー
Swift Selection Search
Swiftly access your search engines in a popup panel when you select text in a webpage. Context menu also included!
10,843 人のユーザー
Tabby - Window & Tab Manager
Tabby helps you manage a lot of windows and tabs easily; it can help you open, close, move, pin, and do many other things on tabs and windows quickly. With Tabby, you can even save all you windows and tabs for later with just one click!
8,526 人のユーザー
Cisco Webex Extension
Firefox ™ からWebexミーティングに参加してください
944,965 人のユーザー
Grammarly: AI Writing and Grammar Checker App
Improve your writing with Grammarly's assistance. Get spell check, grammar check, and punctuation check in one tool. Real-time suggestions for improving tone and clarity help ensure your writing makes the impression you want.
786,078 人のユーザー
Tampermonkey
Tampermonkey is the world's most popular userscript manager.
699,358 人のユーザー
Malwarebytes Browser Guard
The fastest and safest web browsing experience. Secure your privacy by blocking trackers, blocking ads, and blocking malicious content.
509,280 人のユーザー
MetaMask
Ethereum Browser Extension
471,849 人のユーザー
1Password: パスワード保管庫
ウェブブラウザで1Passwordを使うための最良の方法。サイトに簡単にサインインし、パスワードを生成し、情報を安全に保存できます。
324,441 人のユーザー