Good concept but very poorly implemented and ultimately not usable. You can only use the add-on the very first time you install it. So I have to basically clear the browser cache and reinstall the whole thing again to manage the numbers. It just keeps saying "sign in with your browser" but after a million times of signing into the new window, it won't actually sign in. I have 2FA enabled.

To add insult to injury, these people did not build a way to simply manage your virtual cards in the capital one website interface. That's a level of hubris I have not seen from any developer worth their salt - to not create a fallback option in the web interface. Why not just let people create/manage virtual catds on CapOne online interface in case your plugin doesn't work (which based on the reviews, is clearly the case).