Here's my guess: some of Google's / Alphabet's nefarious practices include collecting information on users' previous pages. Fixing this bug the correct way (dis

Here's my guess: some of Google's / Alphabet's nefarious practices include collecting information on users' previous pages. Fixing this bug the correct way (disabling window.opener by default when cross-origin) would put a dent on their cut, so they're using their leading browser to try and influence how the rest of the world tackles this issue: putting the burden on developers means 99.99% of websites will remain open to this bug and to their data collection. Time to find Firefox's equivalent issue page and convince them not to follow the leader.