I am using Signup Shield as supplied on a Sandisk U3 stick. Its fully updated and works fine using FF or IE etc on the host PC.
When running FF from the U3 stick the integration in the browser is missing and it does not detect when I am entering passwords etc and so does not popup offering to save them.
Ok so it was me this time that was the problem.
Apparently yu have to set FF for U3 as the default browser in the settings dialogue of SignUpSheild and then it works.
This does mean of course that if you use FF on the PC as well as the U3 version it does not work with the PC version. You can only have one or the other.
Now we know.