681389 - Session Manager add-on Menupopup children not added to popupset until moved popupset to top of xul file (with 3 specific add-ons installed)

Status: NEW

(Core :: XUL, defect)

Description

[Michael Kraft [:morac]]

Attachment: Screenshot of problem in 9.0a nightly

I was working on my Session Manager add-on and noticed that the menupopup entries in my xul file that are overlayed into the window popupset (mainPopupSet) were not being overlay correctly.  They were empty.  This happened in Firefox 4 up till the nightly loads.  It worked fine in Firefox 3.6

I had 3 other add-ons installed: Dom Inspector 2.0.10, Add-on Compatibility Reporter 0.8.7 and Console2 0.8.  If I disabled ANY of these add-ons it works again.  Also if I installed a fourth add-on it works.

I finally found that if I moved the popupset overlay above the lines defining the menupopup entries being included in that popupset, it worked.

I'm fairly certain this is a bug in Gecko, though where it is and what it is I don't know.

Basic steps to reproduce is to create a new profile and install the following add-ons: Dom Inspector 2.0.10, Add-on Compatibility Reporter 0.8.7, Session Manager 0.7.6.1 and Console2 0.8.   Restart and open Dom Inspector and search for the id of "sessionmanager-ContextMenu" and notice it has no children.

Install another add-on (I picked Tab Counter 1.8.8 and check Dom Inspector again and see it has children.  Also can disable Console2 or Add-on Compatibility Reporter.

If you look at sessionmanager.xul and move the <popupset id="mainPopupSet"> overlay to the top of the file, that also fixes the problem.

Comment 1

[Michael Kraft [:morac]]

Attachment: Screenshot of problem in Firefox 6.0

Comment 2

[Michael Kraft [:morac]]

Attachment: Screenshot of it working after disabling Console2 addon

Comment 3

[Michael Kraft [:morac]]

Attachment: Screenshot of it working after disabling Add-on Compatibiltiy Reporter

Comment 4

[Michael Kraft [:morac]]

Attachment: Screenshot of it working in Firefox 3.6