security

I went to my account and Firefox on android operating system and I was not signed in I click sign in it swaps over and shows me it's logged in I'm having issues where my phone showing up in different locations I'm pretty sure my SIM card has been cloned I've contacted the FBI about some of my security issues so bad I cut the internet off at my house I'm not keeping up with current security measures right now because it's a waste of time whoever is hacking me is just so obsessive I think it's an old neighbor and just trying to wait out and investigation what can I do to alert Firefox to monitor my account or something being open sources or even anybody that does that with this software or is that up to the community am I on my own