I have 2 concerns:

1. I recently read the firefox Terms Of Use paragraph that people are posting which doesn’t sound nice in terms of privacy.

2. Back when Mozilla had their own Mastodon instance called mozilla.social, every time I signed in I would be blasted with trackers according to uBlock Origin.

I’m no expert in these things and I want to ask if anyone recommends that I switch away from Thunderbird Mail and if so, which open source email client? Thanks in advance.