Windows XP browsers with built-in elliptic curve encryption?

I was logging into a site I could have had money in (like a banking site), and was disturbed to discover I was not able to get in using the last version of Chrome for Windows XP. (The last version of Chrome more generally was not compiled for XP.) It occurred to me that a main problem is that XP does not support elliptic curve encryption. Firefox had built in elliptic curve encryption, but they stopped supporting Windows XP too. Thus, I am wondering if there are any browsers compiled for XP that are "up to date" and that also have built in elliptic curve encryption support.

Please don't tell me to upgrade or to use linux. There are over a dozen threads here discussing how the later versions of Windows have spyware, and the reason Microsoft skipped version 9 was to help make people forget that the main problem with Windows 8 was that they removed the start button that was in XP, which implies that XP was about as good as 8 and 10.

Another idea I was toying with was faking it. That is, use an old firefox plug in to give a bogus user agent that claims it is newer than it really is.

Please help if you have any ideas. I am not bothering posting on any computer site because I know they will not allow any answers to be posted besides those from shills saying "Upgrade already, you fool."