Although you could take into account what the makers are telling you.
Google claims Chrome is private too.
all over the news, Vivaldi has not
Becauae not many gives a fuck about Vivaldi enough to reverse engineer it
not like I can validate the Firefox source either
You don’t have to. Thousand of people who know what they’re doing does.
just trusting the website I download it from, or more likely my distro packaging
This is a separate security, not privacy, issue resolved by trust chain model of distro packaging.
Huh, old.reddit.com is so much worse tham reddit.com
RFP probably ensures you give out a predetermined set of fonts as installed.