Script Installer provides simple automatic installs and uninstalls of Wikipedia customizations (user scripts) directly from the script listing page, each with just a single click.
I forked Equazcion's ScriptInstaller script because it had stopped working as of May 2020, due to the changes made to the way that the MediaWiki API operates.
The forked version works exactly the same as Equazcion's original did, it's just fixed - there are no other differences (yet!)
I'm happy to take feature requests on this talk page.