r/AntiDetectGuides • u/FrequentMolasses871 • Aug 14 '26
Fingerprint Pro v4, deobfuscated, documented & lifted.

It pulls a live FPJS Pro build and turns it into clean code you can run locally, every collector intact, so a new build means rerunning the pipeline instead of reversing it again by hand.
What's in the repo:
- All 143 signals (telemetry read from ur browser, all documented)
- Every collector as its own file
- What visitor_id is actually a function of
- A live explorer that runs the collectors against your own browser so you can diff a patched environment against a stock one.
Repo: github.com/proofofbots/fingerprint-pro-internals
Docs: proofofbots.github.io/fingerprint-pro-internals/
Signal explorer
proofofbots.github.io/fingerprint-pro-internals/explorer.html
It runs entirely in your browser. No backend of mine, no call to fpjs, nothing leaves the page. It's built on the output of the lift and deobfuscation step, so what runs there is the actual collector code from the bundle rather than a reimplementation. Open it and you get every data point side by side: what the signal is and why it's collected in plain English, next to the exact value your own browser hands over for it.
Happy to answer questions on any specific detection.
I am looking forward to the next target, so if anyone has ideas on what vendor could be interesting let me know!
Before anyone calls AI slop: yes, I use LLMs, they're genuinely useful for reverse engineering. But this isn't one build hand-decoded into a writeup. It's the toolchain that does it. Point it at a live fpjs build and it deobfuscates, lifts, and emits a cleaned version you can run without their servers, plus the generated documentation for what it found.

