Changes made on firefox arent registered and need to change again every time firefox restarts.

Question

Since I installed firefox on my new PC nothing seems to register. Every time I start it, it wants to give me a tour like the first time I installed it. Fond size on same pages change every time I open them. Change of the home page doesn't register, meaning after I change it on the options it will not remember it next time I restart the program.
On top of that, even though its shows that I am signed it for syncing, it actually does not sync anything from my older PC.

Answer 1

It could be the work of one of your add-ons, or even add / mal-ware.
Look thru your add-ons list and make sure you know what each one is
and what it does.
Some added toolbar and anti-virus add-ons are known to cause Firefox issues.
Open the '''Add-ons Manager <Control><Shift> A''' and '''disable All of them.'''
Also, check the programs that are on your computer
'''Windows:''' Start > Control Panel > Uninstall Programs.
'''Mac:''' Open the "Applications" folder.
'''Linux:''' Check your user manual.
Go thru the list. If you find something that you don't
know what it is, use a web search.
'''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware Troubleshoot Firefox Issues Caused By Malware]''' {web link}