a simple firefox extension

we need to have a simple firefox extension put together that does the following: - has a setup page allowing user to specify which executable to run the current window/tab content against, this setting is to be stored in registry for repeated use. e.g. c:\windows\system32\[login to view URL] - saves the current window/tab content i.e. innerHTML to windows %TEMP% path as some GUID filename. e.g. BDFD1872-92D4-49CB-A6E9-B6A3204151B2 - then spawn the executable (preset in registry or setup page) with the subject stored GUID file as argument.