I have found a way for you to get artistic on your screen with one simple extension for Firefox. So put those magic markers away and pick up Screen Draw.
This add-on for Firefox allows you to draw on any website and take a screenshot of your work. Now, this could come in handy when it comes to writing notes about website changes you would like to see – or you could draw a duck dressed up like Abraham Lincoln.
To use the add-on, all you have to do is go to your toolbar and find the Screen Draw icon. Once clicked, you will pull up the Screen Draw toolbar that has all the tools you need to do some simple drawing on the website you are currently viewing. If you go into the options, you can also configure your default brush color and size too.
You can pick up Screen Draw from the Firefox Add-ons website.