Before you install, Greasy Fork would like you to know that this script contains antifeatures, which are things there for the script author's benefit, rather than yours.
This script contains code that will track your browsing.
The author of this script explains:
Keeps log of chat and has access to your account's messaging abilities (once permitted), to allow you to see moderator-deleted messages and past notifications or/and automate chatting, THIS DATA IS NOT EXPORTED FROM YOUR DEVICE, PLEASE USE WISELY, CAREFULLY AND NOT MALICIOUSLY.