> 3. Don't allow the embedding site to interact in any way with embedded content. Treat it like an entirely separate, opaque layer above everything else, not subject to layering anything over it
I'm actually surprised to hear that this is not the fix here. Instead, they optimized the rendering code, which might not preclude more sophisticated attacks on that side channel.
I'm actually surprised to hear that this is not the fix here. Instead, they optimized the rendering code, which might not preclude more sophisticated attacks on that side channel.