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Is there a "CSS coverage" option in Firefox (or Developer Edition) ?

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  • Last reply by cor-el

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I'm looking for CSS Coverage in Firefox (Like it is in Google Chrome). I saw a YouTube video from a couple of years ago and there was a way to use CSS coverage at that time, but it looks like Firefox removed it... YouTube video:

Mozilla says "This feature is experimental and is not yet available in Firefox", but I hope there is an option to use it in Developer Edition. (maybe we can activate it in about:config ?)

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CSS Coverage was a GCLI command (csscoverage start|stop|report). The GCLI command line tool is no longer available (removed in Firefox 62). There is code in the current release, but I see nothing to start it.

I checked the csscoverage command in Firefox 60 ESR.