Contribute to the project

Are you a Web developer? Get involved in our volunteer efforts by starting to use Firefox Developer Edition today!

Follow us

  • Social media: Follow us on Twitter.
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Test your site

It is important to find and fix Firefox regressions before Firefox users visit your broken site. Mozilla is offering Firefox Developer Edition, so please use this alpha version on a daily basis to develop and test your site or Web app.

Report issues

Please report any regressions you encountered through one of the following ways:

  • Social media: Tweet us the URL of your problematic site. You can also send us a direct message via Twitter.
  • GitHub: If you have a GitHub account, it might be easy to file a new issue on our repository.
  • Bugzilla: If you have Mozilla’s Bugzilla account and can recognize an appropriate component for your issue, file a new bug directly.
  • Email: Simply drop us a line at bugs@fxsitecompat.com.

Improve the documents

If you find a mistake on our document or something not covered yet, please tweet us, file an issue, or send us a pull request directly from the “Improve this page” link on each page’s footer to help us improve our useful developer resources. You can also send us a direct message via Twitter.

If our resources are useful for you, please consider making a small donation via the project manager Kohei Yoshino. Your tipping helps ensure the sustainability of this independent community initiative by covering our server and domain costs. Thank you.

Together, we build a better Web!