Sailfish Browser not compatible

[xopr]

Bug description
Currently, the SailfishBrowser will fail to connect to the map (due to a javascript error)

Steps to reproduce

1. On SailfishOS phone, open Terminal
2. run: sailfish-browser https://pauper.tel/spack_test (or just https://pauper.tel/spack)
3. enter room, choose character, join
4. allow Microphone

Current result

1. page says: Not connected
2. microphone is disabled and the list shows Null Input
3. console is displaying: JavaScript error: https://pauper.tel/spack/assets/index-D6ZPC58G.js, line 36: ReferenceError: WritableStream is not defined

Expected result

1. page should load and display the map

Screenshots
If applicable, add screenshots to help explain your problem.

Environment:

• application version (and commit hash if on test)
• occurs on desktop
• occurs on mobile
• Sailfish Browser on SFOS 5.0.0.73
• occurs on Production
• occurs on Staging
• occurs on Test (commit hash: e50ca11)

Notes, context or workaround
The error seems to occur in LiveKit, due to the way communication channels are set up. WritableStream does not exist yet on SFOS browser.
It's most likely triggered by anything that emits a character update