It’s been a long time coming, but the trust in Firefox and its mother organization, Mozilla, seems to be mostly gone, after a recent commit on the source code removed the “we don’t sell your data” promise, along with a change of Privacy notice and Terms of Use.
Public mail has protections from unlawful access, but is subject to the same search and seizure rules as everything else if presented with a lawful warrant.
The odds of a public email with true E2EE seems damn near impossible to me.
politically impossible not technically. so its pretty much like every freedom and right ever in possibility.