Better question here is, why is this not handled through the browser instead of relying on individual web apps to do it. Block third party cookies by default, delete other cookies on the last tab or window closed and prompt user to save cookies on a form submit ("do not delete cookies for this domain when leaving" type of prompt, for pages with logins, settings, etc). Also remove features that make easy fingerprintin…
I might be wrong but I think the EU regulation that forced these cookie acceptance forms―I can't remember if it was GDPR or some earlier directive―specifically required that the consent submission may not be automated so that the browser can be configured to accept everything. It may have had good intentions as entities such as Microsoft would just set their browsers to default to accept all cookies anyway and a marg…
Yep, i'm just not sure if it was general incompetence or just plain lobbying by third parties to do so.