r3dfox, a modern Firefox based web browser for Windows Vista, 7, and 8!

[VistaLover]

13 hours ago, Hunterw said:

I literally turn it on for Chase and then immediately switch it off when I leave as it causes little authentication related problems elsewhere.*

Well, r3dfox comes with SSUAO (site-specific-user-agent-override) support  , so I bet you can set one just for chase.com and be done with  (i.e., it won't affect other domains/sites) : 

general.useragent.override.chase.com;"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0"

FWIW, "128.0" is the previous ESR version, currently at v128.13.0, which is supported for a month or two more , to be EoS'ed with v128.14.0; it's highly probable by that time that Chase's minimum requirements will get upped to "140.0"  , the current ESR branch (now in v140.1.0) ...

[Mathwiz]

On 8/5/2025 at 10:25 AM, VistaLover said:

FWIW, "128.0" is the previous ESR version, currently at v128.13.0, which is supported for a month or two more , to be EoS'ed with v128.14.0; it's highly probable by that time that Chase's minimum requirements will get upped to "140.0"  , the current ESR branch (now in v140.1.0) ...

I no longer bother to determine Chase's minimum browser version, as there's very little point, once I find an SSUAO that works. But I used to. It never seemed to make any sense though. It would be just some random version or other that was "somewhat" older than the then-current ESR version for Firefox or Chrome. I always wondered if they chose minimum versions that had patched some specific security flaw they were worried about, but who knows?

Still, the currently supported version should always work, at least as long as you remove the "R3dfox" bit, or any other clues that you aren't using genuine Firefox / Chrome.