This might improve drawing performance a little. Usually the browser background is covered completely by toolbox / tabbrowser / statusbar etc, but when you look at it with QuartzDebug you can see that it's still drawn. A plain background color should be a little faster to draw.

Do we need the background-color at all? You made the opposite change in bug 431831, do you remember why?

(In reply to comment #1) > Do we need the background-color at all? When extensions are involved it's possible that the background-color shows (e.g. behind the Download Statusbar), so I think it makes sense to specify something sane instead of the default white. I don't think it will cost anything. > You made the opposite change in bug 431831, do you remember why? Oh, interesting. I hadn't really looked at that patch when I submitted it; it was mostly Kevin's work. I don't know why Kevin chose to make that change.

Comment on attachment 344487 [details] [diff] [review] patch v1 OK, I guess we can just take this on trunk. I'd be wary of taking it on branch at this point though.

pushed: http://hg.mozilla.org/mozilla-central/rev/cfc7b5b533d3

(In reply to comment #1) > Do we need the background-color at all? Do you want to trigger translucency ;-)

Mh, apparently the change didn't have any effect on Txul perf.