> it doesn't have to be files. it could be in memory on the browser.

How'd that work? If it's in memory, the extensions would vanish everytime I shutdown Chrome? I'll have to reinstall all my extensions again everytime I restart Chrome?

Have you seen any browser that keeps extension in memory? Where they ask the user to reinstall their extensions everytime they start the browser?

> but the language of "your computer" implies files on your computer, as it would be what people commonly call it. Merely just the extension is not enough.

But the language of "your computer" also implies software on your computer including but not limited to Chrome extensions.