There's a new way to proxy the modern web for old #webOS devices! Based on the Squid SSL-Bump server that's been hosted for the community for years, but now private, and self-hostable. This option enables the legacy Help content, and runs on Mac, Linux or Windows (via WSL).

https://github.com/webOSArchive/squid-sslbump-for-webos

PSA: this solution is SO much better, that the community proxy will be shutting down by the end of the year.
GitHub - webOSArchive/squid-sslbump-for-webos: Builds Squid binaries to provide an easily installable SSL-bumping proxy for retro devices, particularly Palm/HPs webOS.

Builds Squid binaries to provide an easily installable SSL-bumping proxy for retro devices, particularly Palm/HPs webOS. - webOSArchive/squid-sslbump-for-webos

GitHub