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Yikes; I hadn't heard about this. Does uBlock origin stop this? I certainly don't want my browser doing it.

• lozenge 7y ago
  I don't know, but how is it different from an onclick/onmouseover handler or a redirect uri from a privacy perspective?
• rcxdude 7y ago
  Firefox doesn't have it enabled by default: you need to set a config variable for it to do anything.