Fix Quick Reblog double reblogs after extension update/restart (alternative 2) #1599
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Description
Resolves #1597. See issue for background.
Another way to prevent this problem is to communicate a unique key from the main world handler function to the content script by including it in the
xkitinjectionready
event, and including the key in the request data.Off the top of my head, this seems slightly worse than #1598; it's still not compatible with #1538. It might have an advantage I'm not thinking of, so I'm committing it for completeness.
Testing steps