When an <image> is placed inside a <toolbarbutton> it isn't displayed anymore. The regression range is around the passed weekend. Test case: 1. Install the attached Firebug version 2. Press F12 to open Firebug => The buttons at the left (#fbFirebugMenu and #fbBreakOnNextButton) are missing their images. See the attached screenshot. Sebastian

Gut feeling: bug 653881. Can you easily check this?

I don't know how to build Firefox myself, so I can't further help you there, but Honza might be able to clarify this. Though the bug you mention sounds indeed like a probable culprit for this. Sebastian

I can confirm the problem STR 1. Install https://addons.mozilla.org/ja/firefox/addon/firebug/ 1.11.4 2. Restart 3. Click Firebug icon at the end of Nav-bar Regression window(m-i) Good: http://hg.mozilla.org/integration/mozilla-inbound/rev/4df4f2767a69 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130628 Firefox/25.0 ID:20130628184843 Bad: http://hg.mozilla.org/integration/mozilla-inbound/rev/1b8207252e9c Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130628 Firefox/25.0 ID:20130628185242 Pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=4df4f2767a69&tochange=1b8207252e9c Regressed by : Bug 653881

This should be fixed by the patch in bug 888787.

That patch is now checked in.

Work for me again, thanks! Honza

Also works for me. So I'm happy again! :-) Sebastian