Personally I use Proton for my mail needs but then Tutanota for my calendar. Perhaps something you could consider so your Tutanota account doesn’t get deleted.
I always use a combination of LibreWolf or Ungoogled Chromium for websites that don’t work in LW, but my work insists we use and recommend Edge, their reason being that if a user has trouble in Edge we should know how to fix it, especially as it’s the browser we should be recommending.
Good to know I need to be especially careful of what I view on Edge now though… Yikes.
There’s a period at the end of it. Remove that and it’ll work