[blenderob]

> 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.

[ImPostingOnHN]

It implies more than just the browser, which is likely why it was used for the post title. If it is exclusively limited to the browser, then "scans your browser" is more correct, and doesn't mislead the reader into thinking something is happening which isn't commonplace on the internet.