擴充套件就像是在瀏覽器中安裝外掛。
它們為 Firefox 新增功能，讓上網變得更快、更聰明，或更好玩。
Search Site WE
Search within the current subdomain or within the entire domain, using the toolbar button or context menu.
2,575 位使用者
YouTube Video and Audio Downloader (WebEx)
Download YouTube videos in all available formats and extract the original audio files
113,878 位使用者
YouTube in HD (720p, 1080p, 1440p, 2160p)
Watch YouTube in the full-HD quality or the highest available one
13,330 位使用者
Ecosia — The search engine that plants trees!
Ecosia is a search engine that uses 80% of its profits from ad revenue to plant trees. By searching with Ecosia you can help the environment for free. This extension adds Ecosia.org as the default search engine to your Firefox browser. Give it a try!
319,291 位使用者
Hacker News Enhancement Suite
Hacker News Enhanced.
1,496 位使用者
Update Scanner
監測頁面更新，特別是那些沒有提供 Atom 或 RSS feeds 的網站。
14,648 位使用者
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 位使用者
Dark Theme for Google News
Makes the layout of Google News dark while retaining the original feel.
1,065 位使用者
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 位使用者
Weather Extension
The best way to see the weather right in your browser. Easier than looking outside!
11,918 位使用者
Forecast: Google™ Weather
A lightweight and accurate weather extension for the entire globe based on Google Technology
4,302 位使用者
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 位使用者
Adblock Plus
討厭擾人的廣告嗎？害怕被追蹤嗎？痛恨一大片的橫幅廣告嗎？快安裝 Adblock Plus 讓您重拾網路控制權，自己決定想看的內容。 Adblock Plus 的一分鐘影片介紹（英文）：http://www.youtube.com/watch?v=oNvb2SjVjjI
11,028,634 位使用者
uBlock Origin
終於出現了，一個高效率的阻擋器，使用不多的 CPU 及記憶體資源。
4,854,756 位使用者
Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
3,097,899 位使用者
網頁截圖
使用者可以輕鬆透過網頁截圖的功能，將完整的網頁轉成一個圖檔存放在桌面上，既方便又容易，相信會是您將網頁記錄成圖檔的好工具。
2,223,412 位使用者