CSS style will be added to the page for temprory. To test the style change. How it reflect on page reload. CSS/Js injector will be added to the page for temporary. To test the style change. How it reflect on page reload. Sometime, while developing we need to check the how page look likes for some CSS style change. This extension will help to inject a temporary CSS style into your page and on reload you can experience the effect of the injected CSS.