See https://lwn.net/SubscriberLink/882607/05400c6c8702f2a1/
"Advertisers (and others) can request information via a JavaScript call to document.browsingTopics(), which will return zero to three Topic IDs, one for each of the previous three weeks, in a random order."
So let's limit the leaking information to zero on L3. L2 could return completely fake results or somehow modified results.
Metadata Update from @polcak: - Issue tagged with: new wrapper
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