14,906 extensions found in Appearance

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Full Screen for Firefox
Go full screen with one click on the full screen button. That includes also the full screen movies such as the YouTube, Vimeo, Dailymotion, Youku video player, etc.
Rated 4.4 out of 5
Stefan vd
5,225 users
WhatRuns
Discover what runs a website - This Firefox extension helps you identify technologies used on any website at the click of a button.
Rated 4.1 out of 5
Whatruns
5,174 users
EuroSaver - Amazon Europe Price Comparison
Simplifies Amazon product price comparison between all european Amazon stores.
Rated 4.8 out of 5
Foundere Developer
5,173 users
Fixed Zoom
Extension that sets a custom default zoom for all pages in Firefox. You can set a general zoom for all pages or custom rules depending on the site.
Rated 4.5 out of 5
Ariel
5,079 users
Improve Crunchyroll
Enhance Crunchyroll: theater mode, skip intros/outros, mark as watched/not watched, fast forward/backward buttons, dark mode, ...
Rated 4.4 out of 5
Thomas Tavernier
5,052 users
Tridactyl
Vim, but in your browser. Replace Firefox's control mechanism with one modelled on Vim. This addon is very usable, but is in an early stage of development. We intend to implement the majority of Vimperator's features.
Rated 4.9 out of 5
Colin Caine
5,028 users
Mouse Gesture Events
Control your browser faster and easier with gestures using mouse movement.
Rated 4 out of 5
Simpler
4,970 users
Prolific Assistant
Monitors new studies on Prolific.
Rated 2.9 out of 5
Prolific
4,946 users
RYS — Remove YouTube Suggestions
Stop the YouTube rabbit hole. Customize YouTube's user interface to be less engaging.
Rated 4.2 out of 5
Lawrence
4,893 users
Timer (alarm, timer and stopwatch)
Stylish timer combined with stopwatch and alarm for your browser.
Rated 4.2 out of 5
Karl
4,869 users
YouTube Popout Player
Provides a simple way to open any YouTube video in a popout window
Rated 4.2 out of 5
Ryan Thaut
4,831 users
Copy Selected Links
Right-click selected text to copy the URL of any links it contains.
Rated 4.8 out of 5
Marnes
4,766 users
Rotate Youtube Video (+ Zoom / Mirror, AB Loop)
You can rotate, zoom, mirror, or A-B loop the video. See the full details at the bottom of this page, or press the shortcut Ctrl + Shift + 1 after installing the add-on to open the add-on preferences.
Rated 4.3 out of 5
znwyrz
4,678 users
Sauce for Strava™
Additional functionality for your cycling and running analysis. This extension upgrades the Strava™ website.
Rated 4.4 out of 5
Justin Mayfield
4,656 users
Adless Spotify
Mutes Spotify's Webplayer when advertisements are played.
Rated 4.8 out of 5
NCIH
4,593 users
YouTube LiveChat Flusher (Danmaku Chat)
Provides bullet chatting (danmaku) on YouTube Live, like niconico or bilibili.
Rated 4.8 out of 5
_y_s
4,564 users
Reload All Tabs
Reload all tabs using keyboard shortcut or toolbar button.
Rated 4.2 out of 5
Glin
4,548 users
Country Flag +
Shows country flag based on the server location of the active tab's url
Rated 3.7 out of 5
Glin
4,547 users
Page Screenshot
Take a screenshot from the entire website with just one click.
Rated 2.8 out of 5
Bernard
4,529 users
Nuke Anything Enhanced
Allows you to hide almost anything in any page via context menu
Rated 4.3 out of 5
Patrick Abi Salloum
4,471 users
Window Resizer
Easily set the layout (size & position) of your browser window
Rated 2.9 out of 5
Kelvin
4,459 users
View Page Source
View the source code of a page with the click of a button.
Rated 4.4 out of 5
Jeurissen Apps
4,453 users
RoPro - Pay Gorn
Expands your roblox possibilities including having less girlfriends to worry about
Rated 4.3 out of 5
LuckyTagged
4,447 users
nightTab
A neutral new tab page accented with a chosen colour. Customise the layout, style, background and bookmarks in nightTab.
Rated 4.9 out of 5
zombieFox
4,394 users
Better Darker Docs
Gives Google Docs, Sheets, Slides, and Drawings a proper dark mode based on system theme, plus clearer text
Rated 4 out of 5
red
4,371 users