With the version 130, Mozilla introduces a new navigation bar in Firefox for Android. If you don't like it, you can disable it in the "Secret Settings".
I was not a fan when it popped out on my screen. But, after sometime, it's pretty useful and saves a tap on the three dots button.
I don't know. They are working on a menu redesign too:
I think the menu redesign looks great personally
I like it. It's easier to use and clearer.
They seem to be taking cues from iOS
What?? Ugly as heck