@CyberTech
You can harden the security and privacy of FF
1) Turn off/on unnecessary settings in Options in the browser. For me I Off most of the settings because some connects to Google and also I'm using extensions for better control
2) If you don't want Google to track you then select a high-privacy search engine like SearX.me
3) Use the guides below
Guide: Hardening Mozilla Firefox For Privacy & Security 2016 | Cyber Security Wiki | Viking VPN Service
Privacy Tools | Encryption against global mass surveillance
Note that some of the settings may not be suitable for your set up
No need to be paranoid to apply the hardening guide from GitHub (below)
pyllyukko/user.js
4) Since you are not using a VPN you can set DNS-Over-HTTPS to secure your DNS queries in FF. Follow this guide
Configure DNS Over HTTPS in Firefox - gHacks Tech News
5) Apply some (or all) of the below extensions
Ghostery
MalwareBytes
Cookie AutoDelete
ClearURLs
Skip Redirect
Behind the Overlay
Behavioral Keyboard Privacy
IDN Safe
Adguard Adblocker (with filters)
minerBlock
TrackMeNot
CanvasBlocker (disable canvas fingerprint protection in other extensions)
ScriptSafe
YouTube Container
Temporary Containers (also, enable first party isolation in FF)
Trace
CSS Exfil Protection
Note:- Adjust the settings in the extensions appropriately