Backport fix for bug 1554805
The first-party isolation of permissions has caused quite some regressions. We should try to get the fix for https://bugzilla.mozilla.org/show_bug.cgi?id=1554805 into 9.0
The first-party isolation of permissions has caused quite some regressions. We should try to get the fix for https://bugzilla.mozilla.org/show_bug.cgi?id=1554805 into 9.0