> Yes, but I also think that most people would interpret "Getting a full list of all the Chrome extensions you have installed" as a meaningful escape/violation of the browser's privacy sandbox.

I don't think so, because most people understand that extensions necessarily work inside of the sandbox. Accessing your filesystem is a meaningful escape. Accessing extensions means they have identification mechanisms unfortunately exposed inside the sandbox. No escape needed.

It's extremely unfortunate that the sandbox exposes this in some way.

Microsoft should be sued, but browsers should also figure out how to mitigate revealing installed extensions.