Use 'for in fixIterator' because fixIterator(...) is not iterable
Import Thunderbird helper module only in Thunderbird
Don't allow untrusted content on about: url
Merge pull request #5 from xabolcs/branch-tb-jsm-improvements

Import Thunderbird helper module only in Thunderbird
Merge pull request #6 from xabolcs/branch-nsiaboutmodule-chrome-privileges

Don't allow untrusted content on about: url
Merge pull request #4 from xabolcs/branch-tb-fixiterator

Use 'for in fixIterator' because fixIterator(...) is not iterable
Release 0.1.12