I’ll just leave this here: #1779 - Feature Request: Radio Silence by Default for Browser Startup and Background Connections aka "Disable Phone Home" - librewolf/issues - Codeberg.org
Every time the user opens up their librewolf browser it phones home that 
, started using the browser to servers like mozzila, github, global sign and other.
Leading to creating patterns based on your behavior. IP, TIME, GEOlocation. each time you are about to browse and open up the browser, it phones user just open up their browser
The feature LibreWolf IJWY or (I Just Want You To Shut Up) was completely removed a couple of years ago; a feature its predecessor librefox and old librewolf had, basically don’t phone home each time you start the browser giving out unnecessary metadata
Last time this issue was brought up to some devs they dismissed it