Comment # 4 on bug 107516 from Mike

(In reply to Emil Velikov from comment #3)
> https://bugzilla.mozilla.org/show_bug.cgi?id=1480755#c1

Indeed, this is Firefox's problem.

Аlthough security.sandbox.content.read_path_whitelist trick didn't work for me,
I think this bug should be resolved as INVALID.