*** Failed to load overlay chrome://preferential/content/preferential-phn-overlay.xul
*** Failed to load overlay chrome://mozgest/content/mozgestOverlay.xul
And ends up with a blank grey window - no toolbars or anything, only the title of my homepage. The files above don't exist on my system - "locate preferential-phn-overlay.xul" and "locate mozgestOverlay.xul" return no matches. I've tried reinstalling the extensions but not reinstalling Phoenix since building it takes several hours on my system. When run as root, Phoenix works fine.
Is there a simple documentation file somewhere deep down the dank halls of the Mozilla project that I have neglected to read that gives a simple answer for this, will I need to wait for updates to the extensions or the browser, or do I have to do hex-mode hand-hacking of an obscure file that most people didn't know even existed?