I trust my browser and you trust your browser.
- I trust my browser and you trust your browser.
- But I shouldn't trust your browser.
- The extensions you install are implicitly trusted by you.
- Assuming you did it knowingly and understand the implications, which obviously is not a good assumption in practice.
- But I shouldn't trust the extensions you installed.
- You implicitly trust the software you choose to install, but that doesn't mean you should implicitly trust the software other people chose to install.
- The root of the trust is the (hopefully informed) decision.