Thanks for that link, Tony. I figured out what it was from the first two links (above) but it added some useful info. Even though I've got FF 34 (came out last week, see
here) I haven't got the Hello button yet - seems Mozilla are rolling it out gradually as they're still wondering if their servers will be able to cope with the traffic
Quite like to give it a whizz, since Microsoft bought Skype they haven't done much with it for Linux.
Logitech make pretty good webcams, cost a bit more than six quid but are reasonably priced on
Amazon. Think most/all have a built-in mic. I've got a fairly basic one, works OK with Skype (on Windows and on Linux). Of course, you only need a webcam for video calls - but they are more fun than voice-only calls!