If I load Gmail and then quit Firefox, I see 6 DOMWindows leak. Details that might or might not matter: * I'm already logged in. * I load Gmail by clicking a bookmark on my toolbar that goes to https://mail.google.com/mail/ (not http). * This is with a trunk debug build on Mac with dbaron's leak-detecting stuff. * I disabled all of my extensions before testing. dbaron says "It's possible this is bug 206520".

GC_MARK_DEBUG shows that the problem is probably related to an XPCWrappedJS for an nsIOnReadyStateChangeHandler, which also suggests bug 206520.

Leaked outer window 2225978 at address 2225978. Leaked inner window 1dd7928 (outer 2225978) at address 1dd7928. ... with URI "http://mail.google.com/mail/html/loading.html". Leaked inner window 224cd98 (outer 2225978) at address 224cd98. ... with URI "http://mail.google.com/mail/?view=page&name=js&ver=c0d89211112a7d0e". Leaked outer window 332bad8 at address 332bad8. Leaked inner window 33250c8 (outer 332bad8) at address 33250c8. ... with URI "http://mail.google.com/mail/?view=page&name=hist1&ver=6e8ea81451e33c4f". Leaked inner window 31acae0 (outer 332bad8) at address 31acae0. ... with URI "http://mail.google.com/mail/?&ik=c817c8b81b&search=spam&view=tl&start=0". Leaked inner window 23dec58 (outer 332bad8) at address 23dec58. ... with URI "http://mail.google.com/mail/?view=page&name=hist1&ver=6e8ea81451e33c4f". Summary: Leaked 7 out of 64 DOM Windows Leaked 0 out of 72 documents Leaked 0 out of 17 docshells also affects windows xp

Output like that is not useful. We already know.

*** Bug 337306 has been marked as a duplicate of this bug. ***

Fixed on trunk by checkin of bug 206520.

Btw, I think Gmail fixed this on their end. I hadn't seen DOMWindow leaks (in trunk builds) when using Gmail for several days before bug 206520 was fixed.

odd, because I most definitely was. However, I'm not anymore since using a build with 206520 included.