Inject JavaScript code or CSS at the loading of web pages.
Scripts and rules edition is via the options page of the extension, which is accessible from the "syringe" icon added to the navigation bar.
- Editing JavaScript and CSS with Code Mirror - http://codemirror.net/ (syntax highlighting, ...) ;
- Create rules of scripts execution (execute several scripts in the order you want, filter by web page URL - expreg) ;
- Auto-execution of scripts on page loading ;
- Live edit and execution through button in Chrome bar.