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by Tomuus 1347 days ago
I don't think Firefox was reading any QR codes, but instead was recrawling the link in the "Recents" list on a new tab or bookmarks screen.

This is in no way a problem. There is precedent for browsers eagerly loading links, it happens all the time in regular webpages. This is most of the reason why anchors should be safe/side-effect free.