Because some things only work in Chrome. It's a fact. It's terrible.
We're the frogs being boiled, over the last decade. People sounded the alarms, but they were looked at like they had tin foil on their heads. Now, it's clear they were right.
I'm speaking generally, of course. I use Firefox for all my personal stuff, except for those situations where it doesn't work.
Chrome likes to make up new "standards" and then some websites adopt them immediately.
That said, I can only remember two instances of that slightly inconveniencing me in the past, and both times I was inconvenienced by a Google-run website: once upon a time Google Earth refused to work, and once upon a time I couldn't tweak my Google Meet background. Both are no longer the case.
Citation needed. I've seen the opposite--unless there's a very specific niche that can't be otherwise solved, there's huge internal resistance to going it alone.
The biggest counterexample I can think of: WebUSB was critical to Chromebooks supporting external devices, but I can see why Safari might not want it. It has Firefox support at last, though.
Citation of what exactly? That not all browsers implement the same thing at the same time and that some features are Chrome-exclusive because for one reason or another other browsers refuse to implement it?
Is that really something you need a citation on? You sure seem to have come up with an example of your own.
In the past there were features that didn't work at all; I used to hit those regularly. Device setup flows, AV features, etc. These days, it's never "this doesn't work on other browsers". It's always "this is worse on other browsers", whether because they don't test it or because they don't care.
YouTube is terrible on Firefox. There was a period where it was usable but got increasingly worse with missed frames, low frame rate. On FastMail and Gmail the expanded search overlay doesn't disappear when you click outside (ESC doesn't work), you often get stuck with it. On YouTube when you stop hovering over the "I like this" etc. on full screen video view, the tooltip doesn't disappear. It's death by a thousand cuts.
A lot of IT now curates the extensions for the browsers and doesn't allow extensions not on the whitelist and then they basically just only do that work on Chrome and disable Firefox. It's kinda self defeating in the long run imo but that's the problem in the industry.
I've run into a few restaurant sites whose ordering pages just do not work properly (or at all) in Firefox. Also webgl2 performance is unfortunately still much better in Chrome vs Firefox; as an example, FoundryVTT (virtual tabletop software) works fine in Firefox but is a stuttery mess IME (though it has improved slightly in the last few years).
ups.com is one that really infuriates me. It shows 404s for me on Firefox and works perfectly on Chrome.
Kaiser's website works mostly on Firefox. Recently I had to print a "letter" and on Firefox it was blank and printed fine with Chrome.
I don't know if it's still this way, but Google Meet didn't work very well in Firefox, so last year I took all my meetings in Chrome.
These are just what I remember. There are a LOT more.
EDIT: on the UPS thing... it happens when I follow links from gmail in Firefox. Sometimes it wouldn't 404, but I'd see a "..." and it would just stay that way.
EDIT2: for a long time (not anymore), sending Kaiser emails was broken. Hitting enter would warp to the bottom on the page and I'd have to scroll back up to finish typing. They're completely redesigned the website recently and that bug is fixed.
95% of people who use Chrome have no clue what browser they are using.
They got Chrome when it was bundled with every single installer ever for about a decade (which was so prolific and scummy that Microsoft had to make the "default app" picker system more defensive, because Chrome was abusing it more than microsoft apps were).
When you installed Java, you also got Chrome set as your default browser with no interaction.
Or they one click downloaded it from Google.com because of a giant banner saying "You gotta download chrome"
It's insane to me how rarely people on HN seem to actually know the history of this. Everyone who worked in tech support in the 2010s experienced this.
It was an identical strategy that most spyware and adware used at the time.
Not everyone has a well paying tech job. Many have to use their devices until they literally die and many more choose to do so because getting a newer device would mean having to deal with the bullshit of newer software.
I've just 'upgraded' a friend who was using a ThinkPad T410, released Jan 2010. So sixteen years. There was nothing mechanically wrong with it except it was capped at 8GB RAM and chugged along slowly.
Oh yeah, I know "the average person" still thinks Chrome is the best browser (if they even care at all about what browser they use), but I mean in tech circles is where it surprises me...
We're the frogs being boiled, over the last decade. People sounded the alarms, but they were looked at like they had tin foil on their heads. Now, it's clear they were right.
I'm speaking generally, of course. I use Firefox for all my personal stuff, except for those situations where it doesn't work.