Crashes Firefox when using the "Prevent the bookmarks button from being moved to the Bookmarks toolbar" Feature

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Introduction:
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The feature mentioned in the Summary is supposed to place the bookmarks button 
on the main bar, even when the bookmarks toolbar is open. Graphically this 
works, as the bookmarks button does not appear on the bookmarks toolbar, and 
stays in the main bar.

However, using the bookmarks button in the main bar, while the bookmarks 
toolbar is open, causes Firefox to crash. This occurs when you hover over the 
first items.

Keeping the bookmarks button where it is is a desirable feature, but is not 
useable when it crashes firefox.

Steps to Reproduce:
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1) Enable the "Prevent the bookmarks button from being moved to the Bookmarks 
toolbar" Feature
2) Enable the "Show bookmarks toolbar when a new tab is opened" Feature (may 
not be necessary, but it's the main reason I use this addon)
3) Open a new tab, thus showing the bookmarks toolbar
4) The bookmarks button should be on the main bar
  a) Click the bookmarks button
  b) Hover the mouse over the first few items (eg: "View Bookmarks Toolbar")
5) Repeat step 4 once more

Observed Results:
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[pass] In step 3, the bookmarks button is shown correctly in the main bar
[fail] In step 4, hovering over the first items will automatically close the 
menu opened by the bookmarks button
[fail] In step 5, the same occurs, and immediately afterwards firefox crashes.

Expected Results:
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In step 3, the bookmarks button is shown correctly in the main bar
In step 4 and 5, the bookmarks toolbar stays open when you hover over it, and 
does not crash.

Investigation:
Disabling the feature in the Summary completely prevents this bug.

Contact:
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Feel free to contact me.

Brandon Okert
[email protected]

Original issue reported on code.google.com by bcokert on 19 Aug 2011 at 2:52