Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

為了改善您的使用體驗，本網站正在進行維護，部分功能暫時無法使用。若本站的文件無法解決您的問題，想要向社群發問的話，請到 Twitter 上的 @FirefoxSupport 或 Reddit 上的 /r/firefox 發問，我們的社群成員將很快會回覆您的疑問。