As of Frogans Player for Developers alpha1.3.1 you can view the FSDL source code of any Frogans slide within the Frogans Player interface.
Simply right-click (or ctrl-click using a one-button mouse on a Mac) on an open Frogans site and you will see “View source” in the contextual menu. A window will appear displaying the source code for the current slide.
This window makes for a good debugging tool, especially if you’re building a site using a server-side scripting language, like PHP, and you come across an error.
For instance, say Frogans Player gives you an error message saying that there is a problem on line 59, character 12. If your working FSDL document has a bunch of PHP code written into it, then that problem might somewhere else in your document (like line 63 or line 278)
This window will show you your FSDL code exactly as Frogans Player receives it from the server, rather than your own version. So, you can quickly find where the problem is simply by going to line 59, character 12.