I'm sure gossip can be sandboxed with other software, and it's probably best for gossip not to be involved in it's own sandboxing.
Discussion
Right but with the browser it's intuitively clear that tabs don't talk to each other, so the sandboxing is very obvious and "tangible".
With Android for example, people know how permissions are a thing. On the desktop though, there is no default way of limiting permissions so I'd have to use an OS for this, which feels like a lot of hassle.