Together, We Build a Better Web

A community-driven Web developer engagement initiative focused on the backward compatibility and regressions in Firefox. Documents, latest updates & more.

Latest Blog Post

Sorry for the long interrupt! We have finally compiled the compatibility notes for Firefox 67. Mozilla will be releasing the new version on May 21 instead of May 14 due to an add-on certificate issue, so you still have a whole week to browse through our documents. We don’t expect any major issue so far.

Now we are going to focus on Firefox 68, which will be the next ESR and bringing more changes. Please check back soon.

Documents

Browse by Version

Browse by Category

Browse by Status