Chromium sandboxing means nothing when it leaks so much data.
The attacker can't gain access to the host with javascript.
A browser that support javascript but doesn't have sandboxing might not leak these data but when their are bug in their js implementation, the attacker can gain more access to the host.
What I do here is analyzing the content of TheAnonymouseJoker's posts. When I saw he say 98% Chinese people approve their government, it popped up in my brain today that TheAnonymouseJoker is separating disgusting "journalists" from a secure operating system. Then those "journalists" will get their device hacked by the Chinese government when they came to China. Is that right?