private firefox and keycode

Every time I start firefox as a private window, i get a webroot message saying,  
To activate this extension, please enter your Webroot SecureAnywhere keycode below,
followed by more text, and a box to enter a "New keycode:" which, of course, is the old and only one.
Webroot does this Every. Single. Time. As you can imagine, this is extremely annoying. I'm hoping there's a way to enter the code once and for all, private window or not. Can anyone provide a way to do that, please?
tia!