Comment 5 for bug 36208

Working from a completely clean installation, no extensions of any sort, here's
the situation:

Segfault when installing a theme, with messages to the console like those in the
previous comment.

Segfault when installing some, but not all, extensions, with the same error
messages.

Much of the other behavior above seems to go back to the Web Developer
extension, which causes even more problems (including segfault when closing a
tab or switching tabs); I'll work to file bugs with the developers of that
extension, but in the meantime the two items above occur regardless of any
extensions being present.