You don't need this unless you're planning on writing a script that runs alongside Replay Rewrite.
Questo script non dovrebbe essere installato direttamente. È una libreria per altri script da includere con la chiave // @require https://update.greasyfork.org/scripts/418636/880565/libpbr21.js
this is the original library by pabst, used by many of his scripts.
I'm merely trying to make it usable today by loading it in https versions of pages and making minor changes.
