f9e436ee5f
This patch doesn't include testing. This is in large part because I would like to land this quickly. Ideally before this bug hits Beta. And it is in small part because I believe that testing can be added fairly trivially to a test that will be added in Bug 1889785, right after the soft freeze is over. Differential Revision: https://phabricator.services.mozilla.com/D212867
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