Stylus
Redesign your favorite websites with Stylus, an actively developed and community driven userstyles manager. Easily install custom themes from popular online repositories, or create, edit, and manage your own personalized CSS stylesheets.
109,417 users
Stylebot
Change the appearance of the web instantly
12,070 users
Tree Style Tab
Show tabs like a tree.
208,975 users
User-Agent Switcher and Manager
Spoof websites trying to gather information about your web navigation—like your browser type and operating system—to deliver distinct content you may not want.
94,881 users
270 users
Stylish - Custom themes for any website
Stylish lets you customize any website with custom user styles (themes for websites). Choose from the largest userstyles library to change the color scheme, background, and skin for Google, Facebook, YouTube and many, many more sites.
35,058 users
User-Agent Switcher
Easily override the browser's User-Agent string
64,914 users
User-Agent Switcher
Quickly and easily switch between popular user-agent strings.
24,797 users
Twitter Lume Reskin
Popular Dark Lume userstyle for Twitter, redone as a Mozilla Firefox Addon.
392 users
Userchrome Toggle
This extension allows you to toggle userchrome.css styles on-the-fly with buttons and hotkeys.
1,049 users
Userscript+ for Tampermonkey
🐒 Show current site all UserJS,The easier way to install UserJs for Tampermonkey.
1,006 users
Custom Style Script
Add custom JavaScript codes or styles to any page.
2,753 users
xStyle
Restyle the web with xStyle, a user styles manager. With xStyle you can install themes & skins for many sites and create your own.
246 users
Random User-Agent (Switcher)
Automatically change the user agent after a specified period of time to a randomly selected one, thus hiding your real user agent
3,934 users
927 users
FireMonkey
Super Lightweight User Script and Style Manager
1,535 users
Get Styles
Смена тем и оформлений ВКонтакте. После установки в меню вконтакте появится кнопка «Галерея тем» и там можно выбрать и применить любую понравившуюся тему.
304 users
4,246 users
reStyle
A user style manager which can load local files and apply UI styles even in Firefox 57+
48 users
GX Theme Styles
Personalize your browser with our beautiful preset GX themes or choose your favorite colors and make your browser the most beautiful one.
639 users
Custom UserAgent String
Add a custom useragent string for desired URLs or domains.
1,423 users
Usersnap
Send feedback and report bugs on any website with screenshots and annotations. Metadata (URL, screen size, browser version...) automatically attached. All directly in the browser. Try now, 15 days for free.
101 users
Userback
Real time user feedback, collaboration and screen capture tool.
97 users
Tab Unloader for Tree Style Tab
Tab unload options for Tree Style Tab.
1,217 users
User Agent Switcher
Change your user agent easily. Allows custom user agent based on domain
492 users