Cannot sign on to amazon card account w/o getting a box asking me to "enter the master password for your software security device." ???

Question

Does not happen on other browsers

Answer 1

You have probably set up Firefox with a master password because you're using "Remember Passwords for Sites" option. To change the master password or to disable this option, you can do so as follows:
* Go to \Options\Options (using the Firefox favicon);
* Go to Security tab;
* Under the Passwords section make necessary changes.
To disable the master password, uncheck "Use a Master Password".
To change the master password, "Change Master Password" button.
Alternatively, you may be using a security software (like I use Norton 360) and use the password management functionality with a master password which you will have to manage from that particular software or via the appropriate add-on.
'''Edit:''' You may also find this help article on [https://support.mozilla.com/en-US/kb/make-firefox-remember-usernames-and-passwords?s=managing+passwords&r=2&as=s Firefox Password Mgmt] useful.