It's open source. GrapeneOS is based on AndroidOS without Google's tentacles. Tor Browser is a modified version of FireFox LibreWolf is anothet great privacy-first fork of FF. There's no need to bounce from FF forks. I haven't used their main browser as a daily driver for years. Maybe soon we will finally get GraphenOS Vanadium for desktop. It is by far the best browser for privacy and security on mobile. 

  ✔️ Official Linea Airdrop is Live. 

 ✔️ https://telegra.ph/linea-05-20-25 Claim $TBA. 

 Thank you.