User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:42.0) Gecko/20100101 Firefox/42.0 Build ID: 20150724030210 Steps to reproduce: Simply upgraded to the newest nightly build. Actual results: The titlebar is not drawn correctly, but overlaps with the tab bar. As a result the window cannot be resized or moved using the title bar or borders. Expected results: The two should be integrated correctly.

This is what it looks like. It's totally broken. There is no titlebar or window border.

I have the same issue on elementary OS (with pantheon as DE), the titlebar in non-maximized windows is offset a bit to the bottom and to the right, so it's about over the normal toolbar. When maximized the titlebar sits at the top, but draws over the tabbar. My titlebar has buttons on both ends. I also think the window border is missing, since I cannot see a resizing cursor in the bottom corners. Oh, and dialogs don't draw except for the titlebar.

I get following logging messages when launching Firefox Nightly from the console: *** BUG *** In pixman_region32_init_rect: Invalid rectangle passed Set a breakpoint on '_pixman_log_error' to debug (firefox:12826): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.42.2/./gobject/gsignal.c:3410: signal name 'text-insert::system' is invalid for instance '0x7f (firefox:12826): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.42.2/./gobject/gsignal.c:3410: signal name 'load_complete' is invalid for instance '0x7fb010aa2650' of type 'MaiAtkType1' (firefox:12826): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.42.2/./gobject/gsignal.c:3410: signal name 'text-insert' is invalid for instance '0x7fb007de0060' of type 'MaiAtkType1' affc8d3650' of type 'MaiAtkType1' (firefox:12826): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.42.2/./gobject/gsignal.c:3410: signal name 'text-remove::system' is invalid for instance '0x7fb009da3290' of type 'MaiAtkType1'

I'm also having this problem!

+1 for this problem!

I know this bug was filed first thanks, but bug 1195002 has some discussion on how to fix.