This is the community to discuss about browsers.
Open Source browsers
Closed Source browsers
List will be updated
First two paragraphs feel like reading a scam email, except far more "engrish".
About your first question, if you mean the community description, possibly it is very old, even before Firefox's blunders became obvious, so may that's why it doesn't include other alternatives.
About your second question, who knows. Most people would have guesses and conjectures at best as to why Chrome is the only one with the not recommended mention.
Dont cling to an ecosystem.
There are already many good email providers like mailbox.org, dismail, posteo and more, that work with open standards and normal mails.
Thundermail will be out soon too afaik
I hear, but I have spent tone of hrs. trying to find a replacement. Been told even on here that what I am looking for does not exist, With The USA that probably is true, Maybe in Scandinavian countries, I once found a E-Mail service for Beings Rights Activist, but could not get involved, even though I was-am a Beings Rights Activist.
There are maany and if you pay a very small amount you get a mail there.
Try mailbox.org they are fine, it is what I use
I cannot to pay for that,
Will check it out, again.
It is 1€/month for the basic plan
Duckduckgo browser is a mediocre, Chromium-based browser. Zero reason to use it over Ironfox (Android), Librewolf (Desktop) or a debloated Brave