This is a great app that I've been using pretty much since it's inception on Firefox and Chrome. I rarely have problems with it. Typically it pops up automatically on any page that has fields for credit card information, searches for an existing card number for the site, and if it doesn't find one it automatically generates and fills the information and saves the fake card for future use. Sweet! Hopefully I won't have to change my credit card information on 100 websites next time somebody hacks one. EDIT 2020.07.07: Been having problems for the last month. No longer works on FF. That's the browser I use to do almost all web browsing and shopping. Won't be able to use Eno anymore.