Follow the instructions for removing the HP drivers from your computer device settings, device manager and software apps that relate to HP so you have no printer listed anywhere at all.
Don't download any drivers from the HP site.
Then go to settings, devices, and click +Add a printer or scanner button. Windows will find and install its own driver and you will be back with color and auto duplex printing. To scan, select scan on the printer itself and use the windows scan/fax app. Wierd thing is that the problem here was only on Firefox and Open Office printing. Chrome print driver, even though I removed all (I thought) traces of drivers, still listed HP and worked fine. Good luck.