I've built a chrome devtools extension, and I'm now porting it to firefox. Even if the logic works perfectly, I've got a problem with styling. In Google Chrome I could just press CTRL+SHIFT+J with a devtools window focused to open a new devtools window that let me inspect my extension and the other devtools panels. Is there a similar feature for firefox? How should I debug the styling and DOM of my devtools extension?
Debugging extension's own pages and code can be done via about:debugging
More info: Debugging