Re: A well worn story.
I'll give you a thumbs up for that. I've read opinion pieces about how Firefox is going to die any second and the reasons they state seem completely alien to me. They complain about removed features that I either didn't know existed or did know about, but never used and didn't see the point of. They claim that all users will hate it because of X, Y and Z and I'm often thinking that I will use it because of X, Y and Z.
Maybe I'm just different than most users, or maybe I'm the same as a silent majority and it's those who are most vocal that are actually the minority? Who knows! Personally I like things very minimal and simple. With Firefox (and many other modern browsers) I can have the tabs in the title bar and a slimline toolbar with the URL address bar and buttons below it. Minimal clutter and maximum website. I can also install all of the extensions that I need. I know that tabs in the titlebar is one of the things people say will be the death of Firefox, but I've alway liked it. Many, many years ago, long before anyone else did it, there was a Safari beta that had the tabs in the title bar. I loved it as it wasted less screen real estate, but Apple removed it in the final release. I really wanted them back there ever since, so I'm glad other browsers have followed suit.
Is Firefox perfect? Hell no! Using a bit less memory would be nice (still better than Chrome though, which is the most popular browser out there, so that doesn't seem to matter much to the majority). I could list several more things, but honestly, I could about every other browser too.
Personally, I spend most of my time developing web apps, so I live in the browser for many hours everyday. I've tried them all and they all have their faults. But for me, the development tools are better in Firefox and having them open for a long time doesn't grind the browser to a halt, which it does with some other browsers (Safari, I'm looking at you!). Just the simple thing of having the 'Styles' always shown and the ability to have the 'Layout' or 'Computed' styles beside them for reference is a massive efficiency gain. You don't have to constantly switch between tabs. Safari has started doing that now too, but I don't really use it for development for the reason mentioned above.
So for my use case, Firefox is the least bad of all the browsers I've tried. They all have their faults, but for what I specifically do day to day, Firefox annoys me the least. Not a glowing report I know, but that's where I'm at right now.
In terms of why Chrome has such a big market share, I'm not convinced it's because it's any better than the competition. It's objectively worse in some ways - memory usage and privacy for example. Ask my non-tech friends and family why they use Chrome and the answer is normally because they saw a popup when searching on Google that said it would work better, be faster and more secure. Google has massive marketing clout and brand recognition and that's a big part of it. I was surprised in the early days of Chrome when my non-tech family started asking me about it. It wasn't because they'd used it and thought it was better, it was because they'd heard about it most recently. Having the marketing reach of Google goes a long way. I even installed FF on my Mum's computer and changed the shortcut icon to look like Chrome (as that's what she's always clicked - best not mess with things. It took long enough for her to move from the IE icon the Chrome one!). She didn't notice and even my sister, nephew and niece didn't notice when using it either. The browser is just 'The Internet' to them. So I personally think, for an everyday user, it's not a love for Chrome or a dislike of the changes in Firefox that makes them use Chrome. They just use what they're used to or have heard about most recently. My non-tech friends don't even remember the name 'Firefox', whereas they're reminded about Chrome every time they use a different browser to search on Google. It's marketing and mindshare. Not for every user obviously, but many of the non-tech ones.
Note this is only my very subjective view. And also my personal experience having tried out pretty much every browser for my day to day work. Your personal experiences and views may vary.