button to rename folders and categories

That would be my main priority as well, thanks:)

One thing I miss about using Gmail is the category tabs along the top. It's like having a mini-Chrome browser in Gmail where you can see all the tabs easily and know if there are new emails to look at, as opposed to just having folders in the side bar that are not usually high enough on the screen to look at. One way to take it a step further even than Gmail is to make those category tabs custom tabs so that I could put up to 5 folders of my choice up across the top as tabs. Thanks!

Questo sarebbe importante, ma ora a quanto pare non ci sono...

yes please!

It would be really great if there would be separate folders (or tabs) in Protonmail's inbox, like in Gmail - especially if folks use several aliases and/or domains.

That is the one feature I miss from the Gmail service, because all my emails, though color-coded by label, end up in the same inbox space which gets chaotic-looking very quick. I just upgraded to Protonmail Plus, and thought I'd be getting an organizational tool such as this one.

Can something similar please be implemented? It'd be super helpful!!

A helpful optional feature would be to have "categories" like Gmail does. For example, Primary, Social, Updates, etc. Also, the ability to create new categories would be nice (Gmail doesn't allow this).