Not sure what you are frustrated with (can't read minds), but in my testing, the zoom setting you showed doesn't affect browser chrome, just web pages. Not sure why the rest of your chrome seems oversized, but you may be experiencing a bug. I'd report it.
In any case, I checked out Chromium, and the equivalent setting is labeled "Page zoom" and affects extension popovers as well. As far as I know, extension popovers are not web pages, so your expectation (and Chromium's behavior) seem to be a bug - either in the settings UI, or in the way the zoom setting affects extension popovers.
I just looked at all of those images and I'm not sure what point you're making? The links you shared look about how I would expect them to look at 150% zoom.
Are you saying it has unusual default settings, and that 150% zoom is one of them? For what it's worth in my experience of installing Firefox which are probably done half dozen times in the past year or so on various devices, I haven't experienced anything like this.
I see all of those things, and none of them look unusual. Contrary to your claim, the tab part is not appear oversized but rather a normal size, contrary to your claim the icons also look a normal size, the address bar looks normal size and ublock origin looks the normal size and the settings page looks more or less normal.
It's hard to understand what you think is unusual. Everything in the browser is displayed normally. The page is different because you used a different zoom, and it zoomed the way Page is normally do.
Are you suggesting that the browser tab bar and settings pages should also grow or shrink if you zoom in or out on a particular web page inside of a tab?
I think you're not fully appreciating how unclear you're being with all of this.
