Can it be implemented as normal addon?

[akeck]

I'm using FF on several machines, work, home, notebook, ...
I love the FF feature, that syncs addons across machines. I install a new machine, login to my FF account, and have all addons installed, including AdBlocker,...

If this were an addon, I wouldn't have to see this ugly proton UI at all :)

[black7375]

It would be nice if possible, but I think it would be quite difficult.

[ojaha065]

WebExtensions API is pretty limited when it comes to editing the browser UI. Add-ons can only access handful of browser settings (listed here) and Themes (Standalone or combined with a browser extension) are basically limited to chaging UI background images and colors.

So sadly this doesn't seem possible.

[black7375]

Yes. I also think it's impossible.
Browser UI is not accessible for security reasons.

I'm closing because it's difficult for now.