I have been using Firefox on Ubuntu for over 5 years over the past few months face book does not recognize me when I sign in. Face Book ask me to confirm it is me signing in as they think it is someone trying to hack my account. They send me a code to my email I put this into face book and they let me in to my account. They ask me to change my password this i tried they would not except it as they did not recognize my web site connection. They ask me to sign by another means IE mobile phone this I tried but Face Book did not except that either. I also got a notification from MY Heritage web site this is what they sent me.

We noticed that your My Heritage account was accessed just now from a new device or location: Firefox on Ubuntu | United Kingdom If it was you and you recently logged in from a new device or a new location, all is well and you can ignore this notification. Note that this notification may have been sent to you due to changes in your internet connection (e.g. a new IP address was assigned to you by your provider, or a recent use of a VPN service). Can anybody help please Thank you in advance Tony