While I like it when it works, it doesn't work half the time. It's had the exact same issues for years. Sometimes it will just sit there like it's signing in, only it never does. Other times it will ask you to login, and then the login box pops up and immediately disappears. I've witnessed these same issues on more than one computer/browser.

This extension is extremely buggy.
If it gets stuck in a login/error loop, you can open a new tab and log into the captial one website. then re-open this extension and it'll work.
Aside for the login/something went wrong error, it absolutely kills memory usage. Specifically when visiting a site like lowes.com. It maxed out my memory usage and started to freeze firefox. Initially I thought the latest firefox update was the problem. Nope, as soon as I disabled this extension I saw my memory usage drop like a stone.

Just doesn't work - tries to login and either the login screen disappears or get a message saying "Something went wrong"

Doesn't work, calling tech support didn't help.

It's been better on Firefox lately but still freezes sometimes and stops working. Works about 80% of the time though.

One star because it creates a memory leak with youtube livestreams when chat is open scanning every message for autofill fields.

worthless piece of s#$t !!!!!

This extension has always worked poorly and now only lets certain types of card holders use it at all, with no notice of the change. Bad extension, bad support, shame on Capitalone