Locking down Firefox involves modifying standard settings and accessing advanced configuration flags to stop telemetry, minimize tracking, and prevent fingerprinting. 1. Essential Settings Hardening
These options are accessible directly through the standard UI by entering about:preferences in your URL bar.
Strict Tracking Protection: Navigate to Privacy & Security. Under Enhanced Tracking Protection, change the default from Standard to Strict. This automatically blocks cryptominers, fingerprinters, and all cross-site cookies.
Global Privacy Control (GPC): Scroll to Website Privacy Preferences and check “Tell websites not to sell or share my data”. This legally binding request replaces the outdated “Do Not Track” header.
Disable Telemetry: Under Firefox Data Collection and Use, uncheck all boxes. This stops Firefox from sending performance, technical, or interaction data back to Mozilla.
Enforce HTTPS-Only Mode: Scroll down to the bottom of the Privacy & Security panel and enable HTTPS-Only Mode in all windows. This ensures your connection to every site is encrypted.
Lock Down Permissions: Under Permissions, go into the settings for Location, Camera, and Microphone and check “Block new requests asking to access”. This stops websites from spamming you with popups to access your hardware. 2. Advanced about:config Tweaks How To Increase Privacy & Security In Mozilla Firefox
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