Comment 32 for bug 733233

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James Denholm (denholm-james) wrote :

@Greg (#27) - Thing is, of course, that if it's not the active window, and hence is behind a shadow, the content isn't going to be changing much.* Hence, to update only upon switching to a new window and upon a finalised window resize might be the optimal method.

*Well, sure, you could leave a movie running behind something, but if that's the case you're not likely actively watching the film (hence, exactly accurate representation of the content isn't really an issue).