In Safari's extensions there is one called Ad Guard Icon. When this is highlighted I see some very alarming text that says: Can read sensitive information from webpages, including passwords, phone numbers, and credit card numbers. From all web pages. All browsing history can be seen. I do not understand this. Ad Guard has access to all my passwords and credit card numbers when I type them in? How can this be possible? Please help me understand this. Thank you very much.