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They just said they're more used to the Chrome version, not that the Firefox version is lacking.

(Personally I'm with you in preferring Firefox dev tools - although I'm not someone who needs to use them more than a few times a month - not because I have any specific issues with Chrome dev tools, but because I prefer Firefox, and Mozilla, generally, and I've not found anything that FF can't do.)

Not who you replied to, but: performance analysis, service worker debugging, indexeddb inspection

(I use firefox devtools primarily)

Have you tried the new profiler since you're talking about performance analysis? It's insanely in-depth.

I don't find them lacking - I just don't use them regularly so it feels awkward when I do use them.

Mozilla fired the dev tools team, so features get in more slowly compared to Chrome.