[jamoes]

I don't understand why they don't just create an API that allows extensions to modify userChrome.css. It seems like this would solve a lot of the complaints people have about the new extension framework, and it would be a way better experience for non-tech-savvy users.

[devit]

Probably because any change to the Firefox UI would potentially break an extension using such an API, and part of the point of switching to WebExtensions is to have extensions that never break.

Also, such an API would allow an extension to make the browser UI unusable, which would make figuring out the problem and removing the offending extension quite hard.

[the8472]

Mozilla basically titled the security vs. versatility balance massively in the direction of security with no sudo-equivalent for AMO-distributed addons.

[baby]

because they're inconsiderate of Tree Style Tab users. They could really well include a setting to disable the tab bar on top, but they're not doing it.

There are no security reasons for not having such a setting. None.

[Manishearth]

Tree Style Tabs is used by like half the folks working at Mozilla.

I doubt that's the reason.

[baby]

For some reason I really doubt that statement.

[Manishearth]

I work at Mozilla.

[nol13]

The other half use tab center?

[Manishearth]

shrug lots of folks don't use tab addons. But yes, Tab Center (Redux) is significantly used too.

[baby]

Then care to explain why we still can't hide the top bar as a setting?

[ripdog]

It's happening (as a WE API) but it's taking a while because they're doing it properly, and a lot of the browser expects the tab bar to be visible.

[Manishearth]

Folks are working on it, I've been part of a couple of discussions about this.

https://bugzilla.mozilla.org/show_bug.cgi?id=1332447

This comment kinda sums up why it's a hard problem https://bugzilla.mozilla.org/show_bug.cgi?id=1332447#c116

There's a major problem with addons doing stuff the users don't want, and the tab strip is a critical portion of the user interface so "just let them hide it" has problems with abuse. So it needs to be something that can still be autoreviewed, and it needs to be something that gives clear indications to the user as to what is going on.

[PurpleRamen]

They work on it. The main problem is simply that Mozilla fucked up the transition from legacy addons to the new system. There are so many APIs and functionallity still missing, that most commercial companys would have been killed over it. But with OpenSource this has become kind of normal to accept it. Just Remember KDE 3 -> 4. Python 2 -> 3. Gnome 1 -> 2 -> 3. Breaking things is just to common now.