Every time I log in to Facebook or other pages, for example, I always have to enter the username and password. This was never the case with earlier devices. These words were always saved. I'm using MozillaFirefox on Windows10. Please with exact setting instructions.
Use a password manager (e.g. LastPass)
At the top right, press "Save password" after you have logged into a website (then also use Firefox Sync)
Perfect. It works again.
LastPass
Lately they want money if you want to use more than one device.
I switched to Bitwarden.