Browsers aren't just browsers anymore: they're application platforms. You can write full applications using HTML as the GUI, JavaScript as the application logic and the server as, well, a server.

The typical user doesn't give a shit what browser they use, as long as it works. I write browser applications a lot because that's the preferred platform. Personally, I use what ever browser happens to be on my device at the time. I try to write the application so it runs on Chrome, Edge and Firefox. I hope it also works on safari, but I don't have any Apple devices, so I rely on others to test it for me.

Firefox has a low adoption rate because they do not get their browser as the default browser on most devices. Consumers have to download it and install it. That's a lot of friction. Their implementation isn't compelling enough to get me or most people to go through the process of downloading and installing it.

I'm facing the problem, right now of the dreaded "this site won't function with your browser because it's too old." I can't install a new enough browser on my old OS because the OS is also too old. Now I'm faced with having to junk my old PC and buy a new one or upgrade the OS and all the browsers. I don't have time for this, however, Firefox still allows me to download a version of Firefox which satisfies most websites.

I think you'll see a huge return of users next year when V3 hits

Whoa, I had no idea people stopped using Firefox. What the hell happened? It's decent and the better of my two options on my work computer