Yes, you can. But once you think about it, you'll see that you actually can't. Because once you're making changes to components instead of formalized settings, you are doomed to re-apply them each software update. Not a smart way to customize.

I think you just answered exactly how that's a problem...

The ability to change that css is another one of those things that has been moved to enabling options in about:config that will probably get removed int the future.

And any firefox update could potentially break your css fix.

Yeah but it takes way too many steps to modify the CSS and it's not really worth it when they could have just left it alone.

You think editing this [1] is acceptable configuration??

[1] view-source:chrome://browser/content/browser.xhtml

And the whole thing is now something like 3px higher.. definitely a reason to go back to google, and make the only remaining libre browser fighting for an independent web crumble.

> > First the GUI to edit the GUI disappears, then the about:config option follows later.

> > That's what's been steadily happening.

> You wrote this in a way that is (probably deliberately) misleading. Neither of those things have happened nor is there any indication that they will.

You're not so much misleading as outright lying. That is exactly what has been happening, over and over again.