I was going to say that different people have different needs, but many of the things you bring up simply aren't true or are context dependent. For example: translate and share are not on the address bar (they are accessed via a menu, along with many other things, that is on the address bar). For the most part, tabs are reused. The main exception is when sites tell the browser to open a link in a new window.
Firefox may be far from perfect, but I've found it must more malleable than Chrome.
They move things in mobile UI a lot, so the docs might not reflect that. I know it used to look like on this screenshot, but I haven't had it in my Nightly for a while.
I've tried German and French pages, languages for which translation is supported, but haven't seen the translate icon in the toolbar. I had to go through the menu each time.
Firefox may be far from perfect, but I've found it must more malleable than Chrome.