I am having the same problem and I read that others are having the same issue. I cannot print from Firefox or Safari, only email. I tried to print a document and it was garbage, tried several times, no good. I discovered it when my mail for ebay items started coming back to me. Crap..... Where the P or the F goes on the postage label is an upside down horse......The tracking numbers are also not recognized by the postal service.. Was told that something to do with FF and Safari was the problem. There is supposed to be a fix not yet in automated update but maybe I could find it in the FF web site. Been three day messing around with this stuff and there is NO V106 that I could find. I am not computer illiterate but I am not a programmer either. I have found a way around the label business, but that does not fix the printing problem with docs that I have to print off the browser. If you find a solution, please share. I think my next move is to call Apple Support or find a number for FF.