Web Compatibility

A place to move bugs for sites or content that does not work in Firefox, but works in other browsers. File new bugs at https://webcompat.com/issues/new. This component was previously called Tech Evangelism.

Select a component to see open bugs in that component:


The WebCompat System add-on provides a site interventions mechanism for Firefox user (more info).

Knowledge Base

Meta-bugs used for tracking real-world compatibility impact. Please do not make changes without consulting the Web Compatibility team!

Site Reports

Reports of sites that are broken, or have compatibility problems, in Firefox browsers

Tooling & Investigations

For Web Compatibility tooling or investigation bugs which do not fit into other more specific components.