Bug 402983 changed how we deal with file:// URIs security wise, but there wasn't enough time to figure out how to make that testable and add the tests to mochitest when that change went in. We should add the tests before pushing 1.9 out the door to make sure things work as we expect them to.

See https://bugzilla.mozilla.org/show_bug.cgi?id=402983#c37 for some info on testing this.

DVeditz/Bz/JST should this block RC1?

Moving this to the wanted list - we should test whatever we are unsure about in FILE:// changes separately - this is a catchall for getting the right tests running so shouldn't block.

One way to get automated tests here is to put a small set of test in a zip file and then use a mochitest to unzip and run the tests locally.

Moving to p3 because no activity for at least 1 year(s). See https://github.com/mozilla/bug-handling/blob/master/policy/triage-bugzilla.md#how-do-you-triage for more information