I wrote this blog post to inform the people I know who aren't as tech savvy or otherwise don't put any thought into their choice of browser. Another goal is to help get enough awareness on the topic and make sure it fails.
I've been using Firefox as my primary on both desktop and mobile for about 6 years now, and it's usually pretty great. Desktop rarely has problems. On mobile there are a good number of sites with issues though, because devs don't usually test against it as has had a low number of users. But hopefully this revitalized movement to switch will make them have to care. And that said, 99% of the time these sites are still mostly usable, unless the broken thing is important like say a login screen 😅
I've only had like 1 issue on desktop in the last like 5 years. Mobile I've bumped into a few hiccups with forms, sliders, and other elements not working properly. If I can't resolve the issue by requesting the desktop site I go to my computer or Chrome in an absolute emergency.
That said, I'd take a (waaay) sub-1% failure rate any day in exchange for having the joy of uBlock Origin on my phone. If you're on Android, I can't recommend Firefox enough thanks to the add-on support.
@ZephyrXero Interesting. I've personally never had any problems on Android. I use Iceraven since it has more extensions and the only issue so far has been that initial load is often slow (because of the extensions I use).
I have been using in desktop for about a year and it's been great. I had tried mobile a while back and had some issues but with Google's proposals I'm willing to try again.