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.
149,314 个用户
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.
100,802 个用户
Google Search Fixer
Override the user-agent string presented to Google Search pages to receive the search experience shown to Chrome.
98,706 个用户
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!)
43,328 个用户
Tomato Clock
Tomato Clock is a simple browser extension that helps with online time management.
30,763 个用户
Popup Blocker Ultimate
Best Pop-up Blocker for Firefox. (Best in Rating, Performance, This addon does NOT collect user's data same as Poper Blocker)If your Firefox version is not 57+ please install version 8.1 from Official website.
56,270 个用户
Cookie Quick Manager
An addon to manage cookies (view, search, create, edit, remove, backup, restore, protect from deletion and much more). Firefox 57+ is supported.
51,666 个用户
JavaScript Toggle On and Off (WebExtension)
Toggle JavaScript engine on and off the easy way
12,604 个用户
Impulse Blocker
Block distracting websites. Just list the sites you want Impulse Blocker to pause or completely avoid.
11,915 个用户
Pinned Google Calendar
Go to the pinned Google Calendar tab. If it doesn't exist, it's created.
8,502 个用户
