- Click here to download the zipped up extension.
- Unzip the contained file (this will be a CRX file).
- In Chrome go to the extensions page (chrome://extensions).
- Drag and drop the unzipped JSInjector.crx file onto this page to install the extension.
If you would like to see the source code (either because you dont trust it or you are just curious) you can see the Github project here.