Safari isn't Chromium (it's the opposite, Google forked WebKit and they've diverged). But that's not really your point.
There's a lot of reason to use Chrome: deep integration with Google (privacy issues aside, it's really useful), better add-on dev ecosystem which leads to better add-ons, WebKit was far ahead of Gecko for a while, I personally prefer the devtools in Chrome, developers tend to verify their website works more in Chrome so fewer bugs, iOS is webkit-only, etc.
Firefox is a great browser, especially now. But so is Chrome.
Part of learning to understand others means developing cognitive flexibility.
Of course many say "they somehow thought it wouldn't be available later stupidly!" But I look past that one, and ask for possibly other reasons.
I have asked probably 100 people at this point.
Not a SINGLE person has said "in case they were wrong about the virus, and it was actually dangerous, they wouldn't want to leave their house to go get stuff"
That was the reason my family bought. And some of my anti COVID friends. And no one has guessed that. And they almost can't believe it or understand it.
And this is coming from people who took the virus seriously, but apparently didn't think ahead to not have to leave their house for basic dry goods?
I'm opening myself to understand things. I don't understand the combativeness.
Also, FF extensions still don’t support service workers, only background pages