Instructions
You'll see that the plugin doesn't offer any workflow actions or extra elements when you install it. It's alright. The ID field of the elements you add to your website is how CSSfy operates. Continue reading if you want to find out what I mean!

Whatever you type into this field will be taken by Bubble and used as the element's ID. CSSfy makes use of this functionality so that additional element properties can be customised. The website will look for elements with an ID containing supported commands when it loads. Commands are taken from the ID attribute, processed, and run in a matter of milliseconds. Thus, the ID serves merely as a channel for data to be sent from the editor to the final page.

For more information refer the demo editor.