User-Agent: Build Identifier: Currently Glass can't be disabled, but users may want restore to default background (if they don't want it). Needed 2 booleans for browser and downloads. Reproducible: Always

This feels like WONTFIX to me: complicated pref systems for marginal benefit. If you really don't want glass, you can turn it off at the OS level

This is actually quite difficult to do with a pref since it's done with CSS. Possible solutions: a) We could ship a second theme but that sounds like a lot of work. b) Personas don't appear to style the download manager but if they did, one of those will work. c) It can also be overridden in userChrome.css.

No, I mean add before and after changed lines @ifdef pref browser.aeroGlass.enabled @endif and set true by default.

We could look into having a pref to cause the :-moz-win-compositor pseudo selector never match. I'm not sure what the performance hit on that would be - probably minimal.

Glass should be allowed to be disabled until it works properly with Direct2D. I prefer Direct2D and DirectWrite to Aero.

For now , using persona disables it

No it doesn't. It just covers it. Directwrite is still broken then.

I'll be honest - this is a low priority bug for me. I've got very limited time before Firefox 4 ships and there are bigger fish I need to fry. That said, I think that fixing this bug as in comment #4 wouldn't be too hard if someone wanted to take a crack at it. Bonus points for making it a live pref.

Well as long as Direct2D and directwrite don't cause trouble for Aero in v4, I'm OK with this