Extensions are like apps for your browser.
They add features to Firefox to make browsing faster, smarter, or just plain fun.
Popup Blocker (strict)
Strictly block all popup requests from any website by default. A notification window is opened to allow you accept, reject, open the popup in background page, or redirect the current page to popup address
32,408 users
View Page Archive & Cache
View archived and cached versions of web pages on 10+ search engines, such as the Wayback Machine, Archive.is, Google, Bing, Yandex, Gigablast, WebCite, Sogou, Memento, Naver and Yahoo Japan.
3,093 users
YouTube Video and Audio Downloader (WebEx)
Download YouTube videos in all available formats and extract the original audio files
113,878 users
Forecastfox (fix version)
Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.
46,468 users
Hacker News Enhancement Suite
Hacker News Enhanced.
1,496 users
Update Scanner
Monitors web pages for updates. Useful for websites that don't provide Atom or RSS feeds.
14,648 users
Latest BBC News
Displays latest BBC News in a popup widget Get all the latest BBC News headlines with a single click. Opens a popup widget with the latest news headlines. Quick access to Business Health Science & Environment Technology Entertainment
1,814 users
Dark Theme for Google News
Makes the layout of Google News dark while retaining the original feel.
1,065 users
Forecastfox (fix version)
Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.
46,468 users
Weather Extension
The best way to see the weather right in your browser. Easier than looking outside!
11,918 users
Forecast: Google™ Weather
A lightweight and accurate weather extension for the entire globe based on Google Technology
4,302 users
Toolbar Weather
This extension shows in your toolbar the current weather and the degree in Celsius, when you click is possible see more details about the weather on your city. In addition to being able to view the forecast for the next 24 and 48 hours.
435 users
Adblock Plus
Blocks annoying video ads on YouTube, Facebook ads, banners and much more. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
11,028,634 users
uBlock Origin
Finally, an efficient blocker. Easy on CPU and memory.
4,854,756 users
Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
3,097,899 users
Easy Screenshot
Capture a screenshot of the whole webpage, and save in your desktop in default.
2,223,412 users