Boris, can you please explain what we should do here? Thanks!

So the basic idea is that when a page is unloaded we should stop playing sound from it, whether it's going into bfache or whether the window is being torn down. Bug 814789 does the latter, because nsGlobalWindow::SetNewDocument does this: if (!currentInner->IsFrozen()) { currentInner->FreeInnerObjects(); } before switching to the new inner. To handle the bfache case, I think what we want to do is something along the lines of nsGlobalWindow::SuspendTimeouts and nsGlobalWindow::ResumeTimeouts (as called from WindowStateHolder::WindowStateHolder and nsDocShell::RestoreFromHistory, though for the latter we may be able to do it from nsGlobalWindow::RestoreWindowState instead). And we'll need to basically pause/resume the audio there, all the way down the window tree.

Comment on attachment 728022 [details] [diff] [review] Patch (v1) r=me

Mass moving Web Audio bugs to the Web Audio component. Filter on duckityduck.