Mozilla is a ragtag bunch of random software developers with slight libertarian leanings. If you look at their Firefox open source project, a lot of issues are raised by users and then promptly marked “wontfix” and ignored.
The developers spend time coding things that excite them or that the foundation deems necessary, and “pleasing old-fashioned users” is almost never high on that priority list compared to HTML7/CSS10 support, UX redesigns based on some ivory tower research, racing Chrome in JavaScript benchmarks, and the usage data collected by their monitoring software over bazillions of users.
Also, you don’t pay for Firefox. You’re not their customer. Google is their sugardaddy, so they just have to get enough people to use the browser and use Google search and so they don’t really have to care what you think. They don’t care about backward compatibility and pleasing old users unless there’s enough of you making a fuss about something, and there almost always isn’t because most users are just so used to the suck-it-up mentality from browser makers.
The alternative, user-centric development, is arguably what a lot of the smaller players like Opera, NetCaptor, Maxthon, Iron, Dolphin, etc. tried to do. How many of them have you heard of? Pleasing your niche userbase doesn’t tend to engender massive growth.
That said, if you dislike rapid interface changes, I think Safari has been relatively stable for a while. Opera is still an option, and now it uses the same fast engine that Chrome uses. Even Internet Explorer tends to stay rather conservative, and the latest versions are pretty fast and pretty safe. There are options out there, just sayin’, but as usual you get what you pay for, and the devs won’t listen to you if you don’t represent a majority of their userbase. They’re way too busy chasing the big numbers.
This is probably better suited for the other thread, but if you can provide some example pages where that happens, it’d help a lot. In the other thread I also provided a way for you to keep the forward button always available if you so desire.