Both for a converted xul and bootstrap addon (which are working after conversion), addons -> debug leads to a page where the debugger-sources tree says: Seite enthält keine Quellen (page contains no sources?). (using extra-> developer tools->dbug addon)
Using the developer toolbox, I get a list of js pages in the debugger but didn’t find mine. There are two moz-extensions, but they are not mine.
All that never was a problem in TB60. Any help is appreciated.
You should open the debugger from Tools / Dev Tools / Debug add-ons
Then in the debugger window, select the frame with the URI messenger.xul (for instance) with the button on the upper-right corner. You should see your files in the Debug tab under chrome://content