What's the security story in Ladybird? Do they use sandboxes etc? I'm a bit concerned that hundreds of thousands of lines of C++ browser code written in just three years could be a minefield, but I hope I'm wrong.
Last I heard they were planning to move to Swift [1] partly because of the safety features. Apparently there are still some blockers [2] preventing that move though.
If you care about security, consider using Qubes OS, which runs everything in hardware-isolated virtual machines. My daily driver, can't recommend it enough. Ladybird can already be safely used on Qubes.