Firebase emulator doesn't seem to generate the correct alg header

[zkrzyzanowski]

Hi all,
I'm trying to protect an api with firebase, but the language I'm writing it in doesn't have the firebase admin sdk, so I'm following this guide to verify it using a 3rd party JWT library.
The first part of the guide says the alg field of the header claims should be RS256. However, in my local dev environment with the emulator, I get none as the value. Is there a setting I'm missing here? Is this likely a bug? I'm on v9.8.4 of the firebase js sdk.

[zkrzyzanowski]

Looking into the docs further, I understand that the emulator only issues unsigned tokens as stated here. I assume this means I need a JWT library that can handle unsigned tokens?