If you haven’t previously confirmed a subscription to a Mozilla-related newsletter you may have to do so. Please check your inbox or your spam filter for an email from us.
Os nad ydych eisoes wedi cadarnhau tanysgrifiad i gylchlythyr y perthyn i Mozilla, rhaid i chi wneud hynny nawr. Gwiriwch eich blwch i mewn neu eich hidl sbam am e-bost gennym ni.