I have a Mac and use Safari and Firefox. When I do the Radium One offers, like watch a video, it does not credit me. I wrote to Swagbucks and they sent me a Radium One form to register with. I don't understand it so didn't bother...not worth the time for a few pennies. However, I would like to know if anyone else has seen their points not be added. I always look at how many points I have before I do an offer and no matter if I use Safari or Firefox, it does not work.