https://orbitbymozilla.com/terms

4. Content

A. Content You Share

By using the Services, you represent that you will only share material (including Inputs) that you own and/or have the legal right to share and sublicense to others, including without limitation, content and data contained in any web-page shared through the Services to generate Outputs. When you submit your own content through the Services, you continue to own the rights to that content. You grant Mozilla a worldwide, royalty-free, perpetual, irrevocable, non-exclusive, transferable license to use, copy, modify, adapt, sub-license, prepare derivative works from, distribute, perform, and display the Inputs for the purpose of operating the Services.

I find it kind of suspicious that the extension (the fake spot one to) are proprietary.

I don't want that. I want full control and absolute privacy. I do not want your AI reading my emails. Look at that summary, it's as long as the whole email, and you're not going to be able to trust that it picked up on the most important part of the email. This is not efficiency, this is novelty.