This Add-On analyzes all webpages for which it received permission, looks for Super Mario Maker 2 level codes, in the format XXX-XXX-XXX or XXXXXXXXX (case-insensitive) and replaces them with links to a user-specified level viewer site (by default smm2.wizul.us/smm2/course/XXX-XXX-XXX).
The Add-On can differentiate between level and maker codes and allows the user to specify a target for both types.
Level codes are not replaced when they are already inside of certain containers, like a link, an input field, a code block or a script.
