10,484 extensions found in Appearance

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AutoMute
Automatically mutes each new tab the instant it is opened.
Rated 4.1 out of 5
danBhentschel
198 users
Hide Tabs (Panic Button)
Easily hide and restore all open tabs with click of a button.
Rated 3 out of 5
Allen
198 users
A11Y - Color blindness empathy test
Empathy test for color blindness and visual impairment. This add-on emulates 8 types of color blindness, plus grayscale to check the contrast of your website. https://vinceumo.github.io/A11Y-Color-Blindness-Empathy-Test/
Rated 3.7 out of 5
Vincent Humeau
198 users
cubicon for Salesforce
Differentiate between Salesforce orgs in open tabs using clean, colored cubes. Choose from a range of colours or upload your own image!
Rated 4.4 out of 5
aidan
197 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.
Rated 4.6 out of 5
泷涯
197 users
React Performance Devtool
A Firefox devtool extension for inspecting the performance of React components.
Rated 4 out of 5
Nitin Tulswani
196 users
Somtoday Mod
Adjust the appearance of Somtoday. Adds a dark mode, background images, fonts, colors and more.
Rated 4.8 out of 5
Jona Zwetsloot
196 users
Hacker News Night Mode
Theme news.ycombinator.com with a darker (night mode) theme
Rated 5 out of 5
jbhamilton
196 users
Webtoons dark mode
Changes background color from white to black, when viewing a comic on webtoons.com
Rated 3 out of 5
azerzy
196 users
Tab Discard (Suspender)
Easily suspend inactive tabs and save up memory for your browser.
Rated 3.8 out of 5
Glin
196 users
Language Switcher
Change the language header (accept-language) that websites see via toolbar popup
Rated 3.8 out of 5
keller
196 users
HueHelper
Philips Hue lighting system management
Rated 3.5 out of 5
mig
195 users
Tapas RSS Button
A webextension that adds an RSS feed button on https://tapas.io webcomic pages
Rated 4.6 out of 5
victal
195 users
WinSizeNPosition
Save browser window size and position,restore ones.
Rated 3 out of 5
Susie
195 users
Audible Dark Theme
Adds a dark theme to the Audible Website and Webplayer.
Rated 4 out of 5
MomoDerDodo
194 users
Edit with Emacs
Allow user to edit web-page textareas with Emacs (and other editors).
Rated 4.9 out of 5
dakra
194 users
YouTube Fast Forward & Rewind
Fast Forward and Rewind YouTube videos by a customizable amount of seconds!
Rated 5 out of 5
Laskco
193 users
yttwthmode
Twitch-like theater mode for Youtube livestreams and archives.
Rated 4.9 out of 5
maquinas
193 users
Alarm, Timer and Stopwatch
A powerful alarm extension that supports timer and stopwatch with snooze
Rated 3.1 out of 5
Brian
193 users
Kill It
Kill Ads and Slide-Ins
Rated 4.7 out of 5
als123
193 users
MJsonViewer
Yet, just another json content viewer plugin for Firefox. Before using, you should go to the "about:config" page and toggle the "devtools.jsonview.enabled" to false first.
Rated 4.5 out of 5
D0n9X1n
193 users
showHTML
This extension shows information about a web page's HTML elements as you hover over them. The details are displayed in a text stripe at the top of the screen. Clicking on the text stripe will toggle it between top and bottom placement.
Rated 4 out of 5
freginold
192 users
FACEIT Leetify rating
A small extension that displays leetify ratings on FACEIT.
Rated 5 out of 5
finnb
192 users
Chess.com Custom Themes, Boards - ChessHelper
2025 Setup new themes, pieces, fonts, and boards, remove annoying notifications, popups, and many more.
Rated 4.6 out of 5
fullstackdev
192 users
Toggle Native Tab Bar
This addon, with a little help from some css, shows or hides the native tab bar when the user wants.
Rated 5 out of 5
Irv66
192 users