Hey @nmaas87
Thank you for pushing on this! @rahul-thakoor found that we disabled user namespacing support in OS version 2.83.21+rev1 which Chromium (and others) need for how they use a sandboxed process. We are looking into the best way to sort this out here: https://github.com/balena-os/meta-balena/issues/2319
In the meantime, you can carry on using BalenaOS 2.82.10+rev1 for the browser block, and we are looking into ways to make the browser block work despite user namespacing being disabled. For instance running chmod 4755 on the sandbox executable stops the crash.
Phil