Userscripts is an open source Safari extension that lets you save and run arbitrary bits of JavaScript (and CSS) code for the websites you visit.

Features:

- Open source

- No user tracking

Use cases:

- Automatic page redirection

- Website page manipulation (styling, element creation)

- Custom ad-blocking

- Custom code injection

- Custom style injection

If you're looking for a way to easily create quality of life Javacript code snippets for your web browsing experience, give Userscripts a try.

Visit the GitHub repository for help or to report bugs: https://github.com/quoid/userscripts/