Examine source code of dark shade firefox

{
  "theme": {
    "images": {
      "theme_frame": "blackfoxtopverylastedit.PNG"
    },
    "colors": {
      "frame": "#fffcfc",
      "tab_background_text": "#878787"
    }
  },
  "version": "2.0",
  "name": "dark shade firefox",
  "manifest_version": 2,
  "description": "dark shade firefox , cool modern black dark lines shades firefox persona design, enjoy .(very very last final edit sorry for the edits but i spotted a few issues after submition)"
}