Replying to
@TechieNotNetie@social.vivaldi.net
@TechieNotNetie@social.vivaldi.net @missingno@social.vivaldi.net
Thank you, I stand corrected.
Must have misremembered the effects when I changed that setting a couple months ago while investigating problems with additional reCAPTCHA verification at my parents' house - a combination of mobile network Internet access, CGNAT and Firefox was throwing requests for additional verification while accesing Google and Youtube.
Chromium based browsers were unaffected, and the problem cleared up in a few weeks.