If you need to add stuff to a PDF document, now you can do that online with Firefox. Open the PDF in Firefox and click the Text or Draw buttons in the upper right corner to make changes to your document. Download the file to save it with your changes. Fill in forms online without printing and scanning We’ve all faced this: you need to fill in a form that is a PDF, but it isn’t editable. In the past, your only option was to print it on a dead tree, add things with ink, and then scan it back into ...