Updated to FireFox v35.0, and it's now crashing immediatly on startup. The error listing is "wbload.dll".
Firefox 35.0 Crash Report [@ wbload.dll@0xbae8 ]
If I exclude FF from being skinned, then it will start, but the titlebar is solid black, (no tabs or buttons available).
Edit: I did the customization tweak LightStar outlined above, and now FF is runnign again in a usable fashion, albeit without any skinning applied...