It may have been invented as a cynical marketing move to force people to spend more money, but Cyber Monday has the edge on Black Friday by not asking you to actually leave the house. Many retailers this year have decided to roll their Black Friday deals on over the weekend until today; others have introduced some reasonable discounts on electronics and other big box goods. Kindle Fire tablets: Amazons flagship Cyber Monday deal offers $50 off the price of the 7-inch and 8.9-inch model Kindle Fire HD and the 7-inch Kindle Fire HDX. …