Comment 3 for bug 190675

i have a similar problem and created Bug #187666 a while ago, since then i'm still trying to understand what's going on
all i can say now is that is is not firefox only related, because i can make crash nearly any application.
all i need to do is to open the application e.g. firefox or thunderbird and goto -> Bookmarks -> Organize Bookmarks...
in the new window labeled "Bookmarks Manager" -> File -> Import...
         new window labeled "Import Wizard" click on Next button
         new window labeled "Import Bookmark File" -> click cancel to close this window
        now we are back on window labeled "Bookmark Manager"
               repeat same procedure -> File ->Import
                             firefox will hang now, and eventualy crash