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by exikyut 3117 days ago
This is indeed true, and IIUC using Shadow DOM would be a workable mitigation.

Btw, ignore caniuse etc - Firefox _technically_ does support Shadow DOM, just version 0, which it has apparently supported for a little while now. It's better than nothing in a pinch.

Chrome et al are at Shadow DOM v1, which is what caniuse tests its support/no-support metrics against.