I had to reinstall my Pinterest save button after a system reboot. It works in Microsoft Edge, but does not work in Firefox. The save process begins when I click the button but after selecting an image I only have the option to create a new board - none of my existing boards come up in a list like before - and attempting to create a new board does not work either; I end up with an error message and no new board. I've removed and reinstalled the button several times, logged in and out and in to my Pinterest account. It just won't work in Firefox anymore.