Great idea that worked unreliably for years. Suddenly I can't use it at all. CapOne tells me I have to start using the app in order to validate. I am not putting their invasive app on my phone. So now I have dozens of virtual cards that I can't access.

Does not even allow to sign-in on Firefox.

This extension worked great when I first added it. Like everyone else lately, I find it no longer works, especially since the last firefox update that removed the extension buttons at the top where you could click on the extension you wanted to use. I contacted Capital One to complain and suggest they need to allow people the ability to create new virtual cards from within the app or on the website. I was told they are working on all these things. And that Eno is a third party thing separate from Captial One which I don't see where you can contact them from. Only suggestion was to use Google Chrome instead which I chose not to use anymore several years ago. Hope this info is helpful to someone out there!

Easily the worst extension that I'm forced to use. The multiple virtual card functionality isn't available through the website, and this extension barely works on a good day. It logs me out all the time, and frequently won't let me log back in.

I'd rate it if it worked. It keeps complaining about a difficulty.

It's nice when it works. Probably logs me in a little less than half of the time. Why isn't all this functionality in the main mobile app anyway??

The same as other reviewers, I could not make this work in Firefox. The popup would appear and then disappear instantly. But then I installed it on Chrome, and it worked well there. So, I split the difference between one star and five stars.

Trash. Does not work properly on Mozilla half the time.

I am using eno in Firefox on a mac. It frequently fails. I have the same experience that others have posted here. I try to log in, it brings up another window, the window goes away without logging me in, and I'm back at the original window. I have contacted Firefox and they say to contact Capital One. I have contacted Capital One and they say it works.

Doesn't seem to work. A window seems to pop up for about half a second and then disappears. Never gets to the act of creating a virtual number.

Works whenever it feels like it. Usually not when you REALLY need it. CapitalOne, do better.

Well, tech phone support was useless. I was able to use this, and then never again. It's probably because I use Multi-Account Containers: https://youtu.be/TadM5fqx6uY

Works great...when it works. This extension is super buggy and unreliable. I'd say works about 10% of the time and the rest it gets hung in endless login loops, loading screens, etc. Please do better Capital One.

Willdy's review is correct - if the pop-in window to login keeps disappearing, just delete cookies from capital one. Works as intended after that.