Skip to main content
Switch language
Skip to search

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!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Home
Firefox
Customize controls,...
Template:aboutconfigwarning

- Customize this article
  
  Firefox
  
  Firefox for Android

Template:aboutconfigwarning

Last updated: 09/07/2020

Warning: Changing advanced preferences can affect Firefox's stability and security. This is recommended for advanced users only.

These fine people helped write this article:

AliceWyman, Joni

Illustration of hands

Volunteer

Grow and share your expertise with others. Answer questions and improve our knowledge base.