An easy-to-use font inspector to get CSS styles of the selected element
Spoofs User-Agent strings of your browser with a new one globally, randomly or per hostname
Esta extensão altera as cores, o brilho e o contraste da página para aumentar a legibilidade e traz o modo noturno escuro para todos os sites.
Enables desktop notifications like in Chrome (e.g. Gmail, imo.im) and, if the site doesn't support them, it can notify new messages or updates detecting changes of the title (e.g. Hotmail, Yahoo, Facebook, Twitter). Even if the browser is minimized!
Tema escuro para todos os sites. Cuide dos seus olhos, use o Dark Reader para navegação noturna e diária.
Advanced Feed Reader - Read news & blogs or any RSS/Atom/RDF source.
Reader is the ultimate Reader tool for Firefox.
Read out loud the current web-page article with one click. Supports 40+ languages.
Reverse image search using various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
The main feature of SearchPreview is to enhance your search results pages. It inserts site preview images (thumbnails) and popularity ranks into Google™, DuckDuckGo™, Yahoo™ and Bing™ searches.
Swiftly access your search engines in a popup panel when you select text in a webpage. Context menu also included!
Select some text, right-click and choose"Search image" in the menu, a Google Image tab will open with your results.
A reference for the codes to generate Emojis on popular sites like GitHub or Basecamp and Unicode characters for Twitter and Facebook. Search Emojis by name or view recently selected items. Emojis are automatically copied to the clipboard.
Prevent Facebook from tracking you around the web. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook.
Social Fixer for Facebook fixes annoyances, adds features, and enhances existing functionality to make FB more fun and efficient. Filter the news feed, hide sponsored posts and political posts, hide parts of the page you don't want to see, and more!
Blocks the ”seen” feature of the facebook messenger, and your friends will no longer be able to see if you read their messages.