step 1: build a multiplatform FROST library for the web:

https://github.com/cmdruid/frost

step 2: hack together a remote signer and nos2x fork as proof of concept (and win a hackathon):

https://x.com/PlebLab/status/1850318480576250297

step 3: create a stupid simple multi-device signing protocol with key rotation that supports existing npubs (WIP):

https://github.com/FROSTR-ORG/docs

step 4: make self-custody of your identity great again