Tracking Firefox compatibility
fxcss 0.22.1Source documentation
Firefox changes can leave a theme partly unstyled even when its CSS still loads. These tools help you inspect the browser you have and prepare for the builds your users will get next.
| Tool | What it tells you |
|---|---|
snapshot |
Which browser UI IDs and classes were observed in a Firefox build; saves a JSON baseline. |
changelog |
Which names changed between that baseline and another build, and which removals the theme uses. |
audit |
Which selectors and custom properties need attention in the selected Firefox, with suggested fixes. |
A snapshot records structure; shot records appearance. Neither is a profile
backup. Use audits and visual comparisons together: a selector can still
exist while its layout looks wrong.