Both Firefox and Chromium have battle-tested cross-platform sandbox implementations, but I imagine it'd be laborious to integrate them as a third-party dependency to other projects. Why not spend resources on repackaging them in an easy-to-use SDK instead of reinventing the wheel?
Microsoft is already a Chromium contributor so it's not like they lack in-house expertise or something.
Microsoft is already a Chromium contributor so it's not like they lack in-house expertise or something.
https://wiki.mozilla.org/Security/Sandbox
https://chromium.googlesource.com/chromium/src/+/HEAD/docs/d...