My browser settings are being changed almost a daily basis.

Hi Shaun, are you still having this problem? If so, please let us know what kinds of settings are changing -- for example, home page, search engine, site permissions, etc. Also, does this occur only when you restart your computer, or every time you fully exit and then restart Firefox?

P.S. This site doesn't accept email replies, so please return to https://support.mozilla.org/questions/1419776

Firefox Support,

I have solved the problem, by uninstalling a VPN that had caused all those problems.

Firefox is working, with no absolutely no problems now.

I want sincerely thank you to all of you who replied to me.

I noticed before Cookies and Site Data, Manage Exceptions, the two websites I saved as Exceptions could not be seen at the same time.

But after the latest update, there is no problem with Manage Exceptions.

Thank you very much.

Shaun