This is a really strange problem, something I have never encountered before. I have two- near identical desktop computers Computer 1 is an HP Elite Pro 8300 Computer 2 is an HP Elite Desk 800 G1 Both have the exact same latest version of Windows 10 (Pro 64 Bit Version 22H2) Both have the exact same version of Firefox (133.0) Both Firefox browsers are synced via my Firefox account, so same Settings, same Bookmarks, same Extensions etc. Yet one of them has a problem with remembering certain input field criteria (although they both remember passwords and usernames just fine). I have uploaded some screengrabs as one illustration of this problem Essentially, this a courier website which I use for sending packages. I have a site ID number When I use Computer 1 to make a booking, it has always remembered my Site ID. When I open the page, the SiteID field is already filled in, and the "Remember Me" checkbox is already checked. See Computer1.png However, when I use Computer 2 to make a booking, I have to enter the SiteID every time, even though I check the "Remember Me" checkbox, and click the "Book a Pickup" button, the next time I open the page, the SiteID input field is blank, and the "Remember Me" checkbox is unchecked. See Computer2.png At first, I thought it was a problem with the computer, but I tried using Chrome on Computer 2 and it works fine . See Computer2A.png I cannot think of anything that might be causing this. I have even gone through the Settings pages side-by-side to make sure all the checkboxes are identical. Nothing different that I can find. There are other web pages that do similar things with fields that are not usernames or passwords, but all passwords and usernames for the other website I login to are remembered fine, and they are all listed in the saved passwords section of Settings. Any help or ideas I could try would be appreciated.