with Aero theme. while no-response/freeze,(eg,loading heavy flash file) menu button disappear, title appear, tab-top is cut-off fixed after finish loading.

I believe this is standard behavior in Windows when Aero is active. Nothing can be done to Firefox to change this - other than eliminating the freezing, that is.

(In reply to comment #1) > I believe this is standard behavior in Windows when Aero is active. Nothing can > be done to Firefox to change this - other than eliminating the freezing, that > is. standard ? I have never heard such an issue. which software behave like this ? tell me.

To clarify, this is done by Windows to *every* window on the system - with both custom and standard title bars. As such, Firefox has no control over this. Windows takes over drawing of the title bar to display the text "<window title> (Not responding)" - even though Firefox normally draws its own title bar to display the app button. This bug is therefore invalid, as this is system behavior over which Firefox has no control. Try observing Microsoft Word 2007/2010 hang - you will notice that anything in the title bar disappears.

OK, but titlebar should not cover tab (tabbar) section. titlebar section need more height.

(In reply to comment #4) > OK, but titlebar should not cover tab (tabbar) section. > titlebar section need more height. This is true. Right now, the distance between the FF button/title bar and tab bar needs to be increased. https://wiki.mozilla.org/images/1/17/Firefox-4-Mockup-i06-%28Win7%29-%28Aero%29-%28TabsTop%29.png

seems to be fixed by/with bug 575870

seems to be fixed by https://bugzilla.mozilla.org/show_bug.cgi?id=575870#c99

(In reply to comment #3) > To clarify, this is done by Windows to *every* window on the system - with both > custom and standard title bars. As such, Firefox has no control over this. > Windows takes over drawing of the title bar to display the text "<window title> > (Not responding)" - even though Firefox normally draws its own title bar to > display the app button. > This bug is therefore invalid, as this is system behavior over which Firefox > has no control. Try observing Microsoft Word 2007/2010 hang - you will notice > that anything in the title bar disappears. I don't think I've seen this weirdness even if I get a hang and it shows not-responding. Pal, I don't think this bug has anything to do with bug 585964. Do you have special userchrome?

(In reply to comment #8) > (In reply to comment #3) > > To clarify, this is done by Windows to *every* window on the system - with both > > custom and standard title bars. As such, Firefox has no control over this. > > Windows takes over drawing of the title bar to display the text "<window title> > > (Not responding)" - even though Firefox normally draws its own title bar to > > display the app button. > > This bug is therefore invalid, as this is system behavior over which Firefox > > has no control. Try observing Microsoft Word 2007/2010 hang - you will notice > > that anything in the title bar disappears. > > I don't think I've seen this weirdness even if I get a hang and it shows > not-responding. Pal, I don't think this bug has anything to do with bug > 585964. > Do you have special userchrome? I agree I've probably seen the windows titlebar with a hang though. The fact that the tabs are cut off is what I was thinking is the weirdness part.

(In reply to comment #8) > (In reply to comment #3) > Do you have special userchrome? no.

How does a new profile handle?

Did you check your windows titlebar settings under Windows Color->Windows Color and Appearance?

(In reply to comment #12) > Did you check your windows titlebar settings under Windows Color->Windows Color > and Appearance? something to do with this bug ?

Comment 3 is right. We don't want to change the custom title bar height just for this case either.