Suppose your computer clock is set to the wrong time and date, which means that the date and time on your device are not correctly configured. Some methods are given below to fix it fast.
● Press the Windows Start button or the Windows key
● In the start menu, choose the Settings option
● Choose time and language on the Settings page
● In the date and time zone, you can correct the current date and time on your system
● If you are completed, then close the Settings window.
After reading out the above process, if time-related errors are not sorted out in Mozilla Firefox, then you must dial the Mozilla Firefox helpline number to fix it.
Read more: - https://sites.google.com/view/mozilla-403-forbidden-error/home/fix-time-related-errors-on-secure-websites-in-mozilla-firefox