Created attachment 547726 [details] add-on menu User Agent: Mozilla/5.0 (Windows NT 5.1; rv:5.0) Gecko/20100101 Firefox/5.0 Build ID: 20110615151330 Steps to reproduce: Nightly Tester Tools provides a menu item to customize the titlebar - at least in Firefox and on AMO for TB it also says so. But in TB 5.0 (Windows XP SP3) there is no menu entry for it like in FF.
Component: General → Testing Infrastructure
OS: Other → Windows XP
Hardware: All → x86
iirc, the last item fixed in this area was Bug 502389 - Thunderbird should make use of titlemodifier and titlemenuseparator attributes on the main and message windows have you checked with the addon author or extensions forum?
there is also a newer version of Nightly Tester Tools
Status: UNCONFIRMED → RESOLVED
Last Resolved: 7 years ago
Resolution: --- → INVALID
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