#2 FF 3.6.13 crashes when chrome urls in browser not allowed

[JeeWee]

Not sure if this is a Web Page Fixer issue or an IE tab issue, but decided to report it here as on http://webpagefixer.sourceforge.net/ is stated: 'Note: recent tests show compatibility problems when running this version with some extensions on Firefox with the new chrome-blocking preference set. If you notice this problem, just double-click the notification bar, or add the chrome url to the about:config preference extensions.mozillawebpagefixer.allowedChrome, then retry.'

When 'Chrome urls are not allowed inside the browser' is enabled, and an IE tab version is installed, FireFox 3.6.13 crashes without any warning/pop-up when switching to the other browser by clicking the IE tab icon in the taskbar.
The only work-around that works is to uncheck the option.