@thatbrickster @sally @mametsuko >I use Vivaldi because the promise of a mail client was fulfilled
"I promise that the malware will also have a malware mail client".

>hasn't done anything to disrespect me as a user
It does the ultimate disrespect of not respecting your freedom; https://www.gnu.org/philosophy/free-sw.en.html#four-freedoms

>but I cannot control that.
Yes, you do not control the software.