This was a complete rethink of the UI, like Firefox 29. No one is going to love everything about it. Or to put that another way, everyone will need to tweak it a bit, just like the last time.

There are ways to customize Firefox, but it would help if you could first try Customize to re-organize the toolbar, and then report back on what still needs to be fixed to make the user interface fit your needs.

Customize Firefox controls, buttons and toolbars

its less the fact of the changed buttons, i fixed that already, more the whole interface design, and possible changes of it i tried firefox themes, but they are pretty much just colour it seems, they dont change the sharpness of things for exmaple, or the shape details

its more the whole thing of the interface beeing not more customizable, at least on anything thats not a touchscreen portable device

well if someone knows any decent answer how to better customize this browser, and revert or change some of the little but quite effective interface changes, i would be pleased to no but i guess until then i swallow the pill, update, and try to get used to this and keep an eye out for better customiziation i might have overreacted a bit anyway.... still this is and stays an annoying spot on my love for this browser

I'm struggling with "sharpness." Do you mean something like:

• tweak the shape of the active tab so it is more rounded on the top corners

It's helpful to have a wish list of specific things to try to solve.