We have successfully used our BotBrowser for significant testing in PerimeterX and in production environment and have been able to beat the Challenge (Press and Hold) and get very good px cookies. Use BotBrowser as the solver you will not stuck with the PX upgrades!
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The source is the original code, and the readable has the specific steps to de-obfuscate the original code.
If you are interested in what fingerprints PX collects, you can refer to payload.md, which lists all the information they collect and the corresponding source code.