Disable Google URL redirector (i.e. user data tracking) on Google Search result, including Google Custom Search Engine (CSE) which is used by many websites, and in Google Groups.
< Feedback on Disable Google Search Result URL Redirector
Because the GreaseMonkey addon runs scripts in a sandbox. Other addons such as TamperMonkey is not 100% compatible with the GreaseMonkey specifications, even though it provides more advantages.
Why append to HTML?
Why don't you just run the script without appending it to the page?