Script Injector is a Google Chrome add-on that enables you to quickly inject JavaScript and CSS into webpages.
You will be able to edit scripts and create rules from the Options page as well.
Script Injector is cross-platform and it works on Mac OS X, Windows and Linux.
NOTE: To install the Script Injector extension, drag and drop the downloaded .crx file onto the Chrome Extensions window.
Here are some key features of "Script Injector":
· Edit JavaScript and CSS with Code Mirror
· Create rules of scripts execution
· Execute script on page loading
· Live edit and execution