My XP computer got a window that a newer version of java was available from Oracle, so I made the necessary clicks to install it.
That day, when I tried to use the address book in my Juno e-mail window in the FireFox browser, the address book came up as if there were no listings in it, three times when I tried it.
I tried it again just now, and it listed e-mail names and addresses, but it does not put them into the e-mail.
Is NoScript installed on Firefox? Maybe that needs reconfiguring.
It's a VERY good security add-on. Even you'd know, if you had it, I'd suspect.
It can take some getting used to, though.