Interestingly, Firefox does have these bugs, but these apps will not work on Firefox due to other issues.
Actually, it’s not clear whether these are bugs or just different interpretations of the specifications
[1] https://chromeenterprise.google/policies/#BlockThirdPartyCoo...
[1] https://chromeenterprise.google/products/chrome-enterprise-p...
I have 3rd party cookies as well as all ads and trackers blocked and have no major issues. On the odd occasion a site doesn't work, it doesn't get my business/attention. Non-technical people should be afforded the same protections.
That said, this has been on the table now for years so it's time for the operators of these old apps to feel the heat. The Times They Are A-Changin'
Secure sessions (ie first party cookies) are unaffected. Your bank is likely entirely unaffected beyond whatever tracking cookies they’ve been installing.
These cookies have nothing to do with the people you call into. If the bank’s help desk can access your first party cookies, may God have mercy on them because hackers and the government won’t.
These changes almost entirely affect third party tracking, and the occasional niche, legitimate use case. Those are fairly rare, in my experience. The vast majority of core functionality in applications are fine with only first party cookies.