Is there a web browser for the 1st generation Kindle Fire that uses TLS1.2 or higher? Various websites are starting to fail to load in the built-in Silk web browser, and I've tracked the issue down to the fact that Silk uses only TLS 1.0.

TLS 1.0/1.1 is outdated and insecure to such an extent that major websites have begun refusing such connections outright.

I asked Amazon support if there were any solutions or workarounds, but since the 1st gen Fire is no longer supported there really isn't one. I looked at sideloading a different browser like Firefox, but the APK refuses to launch (I'm assuming my version of Android is too old.)

I'd rather not throw out a device that still works perfectly if I can reasonably avoid it.
Firefox 47 can be installed on the 1st generation Kindle Fire. It supports TLS 1.2.

Download link: Mozilla's official FTP.