Firefox on android is terrible. The UI is awful (how hard is to create a usable bookmark system?) and forced opening a new tab are my two pet peeves. Also, it is much, much slower than a chromium based browser in my experience and seems to take a lot more memory. Also, occasionally I'll find websites that don't work 100% because they were coded primarily for chromium based browsers. FU Google.

For me, until all below are supported Firefox can't be my primary browser.

1. PWA not supported and only possible with FirefoxPWA. I can't rely to anything but native, Mozilla could break FirefoxPWA any time they want.
2. I use my browser for my multimedia needs and I use my own Emby Server. Firefox doesn't support mkv container and the most important it desn't support HEVC. Please do not tell me about HEVC royalties and how much Mozilla would have to pay MPEG-LA. Chromium based browsers have enabled hardware HEVC decoding and they pay nothing to MPEG-LA because the royalties have been already payed by my graphics card. Mozilla simply doesn't care.

On my private PC I use firefox on my work laptop I use chrome. The gmail and gdrive integration just makes it easier.

Still on my private I have to switch to chrome for a few things because it just has more storage

Websites glitch out more often on Firefox. I had my favorite Mastodon instance not letting me scroll back up because of some weird jittering bug that only applies to Firefox for some reason.

One reason is that if you use Gmail, every two weeks appears a "y u no use chrome" nag popup that can't be permanently dismissed

Number 2 for me. And it's noticeable. I'd love to use it, but I just can't ignore the performance difference.

I've used Firefox for years and I love it on Android, but on my work laptop (MacBook) I really enjoy using Arc. The vertical tabs let me organise things better, the spaces let me isolate tabs properly in a visually pleasing way, and I don't really care for extensions on desktop as I don't really browse much outside of work. I also prefer chromium dev tools, though it isn't that bad to switch to Firefox's dev tools.

If Firefox adopts few features from Arc, both in form and function, I wouldn't mind coming back. I know sidebar exists which lets you have vertical tabs via extensions, but damn Arc does it the best so far, natively!

Edit: oh, another reason was lack of background blur effects for Google meet. It's coming soon I think (I filed it on bugzilla), but damn it was needed like 3 years ago.

Back when IE was on top and Firefox was the best browser, firefox started to put a lot of bad updates, then chrome came, it was faster and firefox started to lose its marketshare, for while firefox only peformed well on linux, by the time quantum came out and it's performance was good on windows again, Chrome was already the new IE, but Google is way better at managing this leadership it than Microsoft ever was, the only technical problem it has is devouring RAM.

In my opinion, gecko being so tied to the browser is also a problem. There's a ton of browsers using Blink, that gives google a lot of control over how the web will evolve. Having other browsers using gecko that aren't Firefox forks would be great.

If you've been on youtube for the past 6 months or so, there were a lot of OperaGX sponsorships given to large creators and a decent majority of people have used it, liked it, and started recommending it to others via youtube comments.

There's also the fact that chrome is the browser that, at least here, is the most well known at this point and is usually preinstalled on school computers, so this builds up familiarity.

And probably a smaller reason why is because mozilla itself - it hasn't been that great of a company and the firefox over the years has gotten somewhat worse and worse.

almost no one cares about what Firefox adds, the convenience and trust Google got pretty much got everyone i think

Sadly, on pc many ppl that are not tech savvy assimilate internet to google chrome, I had some cases where they asked me "I want to install internet" when they means I want to install chrome to browse internet. I remember when chrome became more known by 2009/2010 Firefox had some issues, it crashes frequently and it was a bit slower, so people who found chrome faster adopted it fastly and it was more and more recommended. In my case I'm using FF since 2006 and I never stopped.

I didn't find the performance gap really high when I switched from Chromium to Firefox. Even on my shitty old laptop, Firefox works fine. I have to admit though that it uses way too much memory.

I do agree with your 3rd point though. History has taught us that defaults matter a lot. Firefox isn't a default anywhere apart from linux distros and FirefoxOS was a failure.

I have no doubt that the second that FF gains a sizeable market share they will just turn in to literally every other corporation that has ever existed. They're not special, they're not your friend. They are selling a product to make money. And while they're struggling, they are working their asses off to make a good product that beats the alternatives.

So until FF announced their intention to DC, I'm not telling a fucking soul.

Most people don’t know how to use extensions well and how to use Firefox well. (Most of my friends in their 30’s still live without ad blockers, so I don’t think many are educated here)

All browsers have extensions, even Safari. This has nothing to do with FF particularly

It’s just not as fast as Chrome or Brave. I can’t deny this, but despite of this, I find it’s worthy.

Firefox is now a memory hog as bad as Chrome, but doesn't offer speed and responsiveness, which is kind of a shitty trade-off

It’s not the default.

Neither is Chrome, yet people actively download and install it.

Many features which are Google specific aren’t supported.

True

Many websites are just not supporting firefox anymore (looking at you snapchat), but you would be right in saying this is the effect of Firefox losing it’s market share not the cause (at least for now) and you would be right.

True

Because Mozilla sucks as a company. They should be coming up with new ways to promote Firefox. Instead they are just getting paid by google and selling vpns

I use Firefox. The only thing I don't like about it is that Duck duck go isn't a terribly accurate search engine compared to Google.

Despite the memes, Firefox was the one which decided it wanted to deep throat 30gb of my ram by default for no discernable reason so I stopped using it. Only extentions I had installed were ad block and the reddit enchantment suite. Since then I've been really enjoying the video pop out of opera.