It's not broken, because the Firefox certificate storage isn't empty when you install it. It includes the ones recognized by Mozilla.
https://www.mozilla.org/en-US/about/governance/policies/secu...
https://www.mozilla.org/en-US/about/governance/policies/secu...
https://bugzilla.mozilla.org/show_bug.cgi?id=1134506
Down around 0200 PST 2015-02-19
EDIT: credit
[1] cpeterso https://news.ycombinator.com/item?id=9072642
I guess Firefox should block that plugin as malicious.