The installation Procedure is very simple and straight forward.
First you have to download the plugin from here , Then extract it and upload to wordpress plugin folder. Once you have uploaded the files go to plugin page and activate it.
Once you have activated the plugin go to settings tab under Settings. Here you will be getting the instruction shown as below
Follow these steps to enable the Dropbox CDN features
Step 6: Copy only the highlighted section of the Public URL (see the image below) into the option ‘URL to public folder’, including the string of numbers (this is your user folder). I’ve hidden mine in the image.
Click on save . now you have to test your CDN. Â For that useÂ firebugÂ and identify your urls shown like below screenshot