WPILib install page fails to detect OS in Firefox or Safari

[auscompgeek]

On https://docs.wpilib.org/en/stable/docs/zero-to-robot/step-2/wpilib-setup.html I get the following error in the console.

Uncaught (in promise) TypeError: navigator.userAgentData is undefined
    <anonymous> https://docs.wpilib.org/en/stable/docs/zero-to-robot/step-2/wpilib-setup.html:926

The offending source code line:

frc-docs/source/_extensions/wpilib_release.py

Line 86 in f8306ce

let ua = await navigator.userAgentData.getHighEntropyValues(['architecture', 'bitness', 'mobile', 'platform', 'platformVersion']);

[TheTripleV]

That feature is only supported in Chrome because other browsers don't expose that api.

[TheTripleV]

https://caniuse.com/mdn-api_navigator_useragentdata

[TheTripleV]

Using navigator.oscpu would work on Windows Firefox.
On macos:

• Chrome works currently
• Firefox doesn't currently work but could work in a hacky way: oscpu always returns MacIntel, even on arm macs. But loading webgpu and querying the gpu name will differentiate the 2 architectures.
• Safari doesn't work.