Bug 776223 - Catch NullPointerException from Samsung's buggy clipboard API. r=blassey a=akeybl

--HG--
extra : transplant_source : %1A%D0%D6%09%CC%D1%DBm%06c%DBycO%EB%ED%3F%29%E6%F5
Bug 872235. Disable discarding of not visible images in the current tab on beta. r=joedrew a=lsblakk

We don't want to see bug 845147, so disable bug 689623 on aurora.