Ubuntu: 14.04 Firefox: 35.0.1 Main Menu: Files, Edit, View, History... Problem: the folders in the main menu e.g. under bookmarks menu pop up are not clearly visible. I would like to change the background colors or show the folders but I could not find a way to do this. Tried so for: using themes, stylish add on, userChrome.css in the profile. All these options change e.g. the tab color or the in page menu. However, none of them I have been able to use to change the main menu. Tried to attach an image but it does not upload.