I'd buy a copy too if there were a desktop version. Both to get AA/DL/WN tracking and to avoid the issue that Firefox periodically seems to expire the cookies that store the passwords on the local machine and then I have to re-enter them for all of my accounts (although you could call this a "feature" since it keeps you from losing the muscle memory to type those passwords in for the times you actually need to log in to the airline/hotel site to redeem).