I use Firefox for most of my personal browsing other than Fastmail's webmail interface, and most of my general work browsing.
I use Chrome for a lot of testing and development at work and for dealing with PayPal. These things all get separate profiles, and Chrome handles multiple profiles better than Firefox. Yes, I know about Firefox containers, but I need separate bookmarks and history. Containers just deal with cookies and maybe cache.
I've been tempted to switch to Chrome for at least HN and Reddit because I tire of dealing with Firefox's spell checking. It regularly tells me things are spelled wrong that are not (such as "webmail" in this comment). It's not just that it is terrible that irks me--it is that it is inexplicably terrible.
What I mean by inexplicably terrible is that they are using Hunspell. That's the same open source spelling engine that is used by Chrome, and LibreOffice, and MacOS. Those all have great spell checking. I thus infer that Firefox's problem is not an engine problem. It's a dictionary problem. So why don't they they grab the ones LibreOffice uses?
Here are some words that came up in comments of mine either here or on Reddit that Firefox incorrectly told me were spelled wrong. Each one interrupted my writing flow as I had to stop and go look it up elsewhere to make sure that I had it right.
> all-nighter auditable automata blacksmithing bubonic cantina commenter conferenced epicycle ethicist fineable inductor initializer lifecycle micropayments mosquitos pre-programmed preprogrammed prosecutable responder solvability spectrogram splitter subparagraphs subtractive surveil tradable transactional tunable verifiability verifier
There's an issue in the Bugzilla for reporting misspelled words. I've reported all of those there so they should eventually be fixed. I'm not sure how long that takes.
Here's a bunch I indirectly reported earlier, that are now fixed:
> "ad infinitum" anonymized backlit bijection commoditization else's handwrite heliocentrism merchanting natively photosensor plaintext pre-fill preload prepend resizable scoresheet surjection unrequested
(Indirectly because I asked about them on /r/firefox, and someone responded telling me about the Bugzilla issue, which he had already added them to).
Here's my list of ones I have not yet reported:
> ballistically chewable counterintuitive exonerations mistyped phosphine programmability recertification shapeshifting tradeoffs webmail