Examine source code of Firefox title color

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_LABS.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Firefox title color",
  "manifest_version": 2,
  "description": "Uses the same color as the titles in windows, creating the illusion of a title that doesn't exist. Perfect for windows-computers without aero and for firefox 3.6."
}