Not exactly.

uBlock Origin blocks the widgets (with the “EasyList – Social Widgets” blocklist, I don’t remember if it’s on by default). As would any other blocklist based blocked do like Privacy Badger, uBO is just better.

FF’s strict mode has something called Total Cookie Protection that makes it so Facebook widget on site A cannot read the cookie dropped by the Fackebook widget on site B. It isolate 3rd party cookies for each website.

Because it doesn’t bring anything more than Firefox in strict mode and uBlock Origin.

Drop IDCAC and Privacy Badger, add consent-o-matic, sponsorblock and bypass paywall clean.

Check Arkenfox for Firefox config and extension recommendations.

https://github.com/arkenfox/user.js/wiki/4.1-Extensions

Only use temp mails for unimportant, one-shot account, otherwise use an email relay.