The theme has to be updated for the "Inspector" in Firefox 40. The check box for "Browser styles" in the "Computed" tab is misplaced. New close buttons are also in a bad state. Also, the "Collapse pane" button image is missing. For versions beyond Firefox 40, e.g., Developer Edition 42.0a2, more buttons are missing their image and the "Box Model" is not presented properly. I created a patch using Stylish, but I will be working on a proper solution in a fork I made.
The theme has to be updated for the "Inspector" in Firefox 40. The check box for "Browser styles" in the "Computed" tab is misplaced. New close buttons are also in a bad state. Also, the "Collapse pane" button image is missing. For versions beyond Firefox 40, e.g., Developer Edition 42.0a2, more buttons are missing their image and the "Box Model" is not presented properly. I created a patch using Stylish, but I will be working on a proper solution in a fork I made.