From 410613 Comment 61: > (In reply to comment #60) >> Firefox moved the null check into their isElementVisible(). We should too. > Good idea, could you file a followup for that?
Created attachment 482145 [details] [diff] [review] Proposed fix v1.0 Move null check to isElementVisible() and fix callers.
Pushed to comm-central: http://hg.mozilla.org/comm-central/rev/68913ca8ed66