How can I return a password into my add-on in JavaScript?

Question

I am trying to create an add-on for firefox that detects when a password is reused. Therefore I need to return the password entered in the browser to compare it to the database of already stored passwords.

Answer 1

If you want to add password in your website use PHP for safe but if you insist on JavaScript you can read about MD5 and MD4 as libraries in JavaScript they are as safe as they are so old.

Answer 2

And to have fun you can use if(value == password)