Are you 100% sure that the problem come from your keyboard? if yes, it can be hardware problem (ask the manufacturer of your keyboard for assistance) or problem from the software and/or driver installed by your keyboard (even ask the manufacturer for assistance).
I'm not expert in both but I can use my logic to assist you
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To access the keyboard driver and setting, you may go to control panel + Hardware and sound (view devices and printers), your keyboard logo will show up with other devices and printers, right clic on the keyboard and then keyboard setting (I don't know what you will get here because I don't know what type of keyboard is yours, but you will be lucky enough seeing something related to your browser). if you see nothing related to your browser in the keyboard settings, try to find what software are installed by your keyboard by going for example to programs and features in your control panel. "Some keyboards and mouses install some software for more control by the user and more". If no software appear to be installed by the keyboard other than the driver, ask the manufacturer to replace this dam keyboard + 5000 USD damage for your dead time.
Good luck and have fun