The top 25 most used Firefox add-on in Appearance category

Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.

Right-click a section of text and click the Translate icon next to it to text translate or listen to it in your language.

Remove all annoying ads from YouTube.

Easily skip YouTube video sponsors. When you visit a YouTube video, the extension will check the database for reported sponsors and automatically skip known sponsors. You can also report sponsors in videos. Other browsers: https://sponsor.ajay.app

A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.

Show tabs like a tree.

Read out loud the current web-page article with one click. Supports 40+ languages.

Save and restore the state of windows and tabs. It also supports automatic saving and cloud sync.

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.

Create, modify, and quickly change tab groups

Navigate, operate, and browse faster with mouse gestures! A customizable mouse gesture add-on with a variety of different commands.

Hide YouTube related videos, comments, video suggestions wall, homepage recommendations, trending tab, and other distractions.

A beautiful New Tab page with many customisable backgrounds and widgets that does not require any permissions.

A customizable, password-protected website blocker and redirector.

Increase browser speed and reduce memory load and when you have numerous open tabs.

A download manager with the ability to pause and resume downloads, download remote files, and more.

Youtube Extension. Powerful but lightweight. Enrich your Youtube & content selection. Make YouTube tidy&smart! Layout Filters Shortcuts Adblocker Playlist

Tranquility Reader improves the readability of web articles by removing unnecessary elements like ads, images, social sharing widgets, and other distracting fluff.

The entire page will be fading to dark, so you can watch the videos as if you were in the cinema. Works for YouTube and Beyond. Dark mode for all websites. It works for all known video sites such as YouTube, Vimeo, Twitch, Dailymotion, Facebook, etc.

Allows you to restore the tab you just closed with a single click—plus it can offer a list of recently closed tabs within a convenient context menu.

Edit the contents of a web page prior to printing or saving. Elements in the web page can be edited, formatted, hidden or deleted. Unwanted content, such as adverts and sidebars, can easily be removed.

Stylish audio equalizer in toolbar popup.

Removes and prevents popups, overlays and cookie notifications, other tools do not. Enjoy the original look of the internet.

It permits just with a single click to copy an emoji. There is a search-box and the "Most used emojis" section (the first one). If you want to send feedback or report bug, please contact me: https://www.emojiaddon.com/help

Make every web page (or just the pages you want) display light text on dark backgrounds. All color variations are fully customizable.