I wonder how many people reported false charitable donations because they thought they were giving directly to the organization, rather than to the PayPal 501c.

If you add the plugin.load_flash_only preference to about:config (and then turn it off) you will temporarily re-enable NPAPI plugins in Firefox 52. This is useful because you can turn it on in normal (pre-version 53) Firefox, and then update to 52 ESR once that is released, to keep people on a supported version until 2018 while you migrate away from plugins.