brian initially started work on the extension, then I did for a few months, now it's back on brian's plate. In my experience it was rough debugging anything within the webview after being used to the power of chrome dev tools and firebug. For the most part I was able to test the webview bits in an actual browser, but it was those times where the embedded browser behaved differently that really made things rough.

Debugging things within AIR was easy though, and although I had near-nil prior experience with actionscript my javascript background got me up and running right away.