1. This extension has hooks to prevent being deleted when you attempt to uninstall it. This alone should be grounds for removal from the marketplace. ONCE INSTALLED, THIS CANNOT BE UNINSTALLED - FIREFOX WAS UNABLE TO REMOVE EXTENSION IN TROUBLESHOOTING MODE. Functionally, this is a virus.
2. Capital One advertises this extension as earning you $40 off an order you are placing in return for installing the extension. This is a straight-up lie and constitutes fraud.
3. This extension not only monitors every page you visit, but all your personal data such as reading your emails when you open them (e.g. GMail) - it says so right in the privacy policy. How is this legal? How has this not received any pushback? If Google said they'd be advertising to you based on your doctor's email to you, there would be hell to pay.