Examine source code of Blue And Blacker

{
  "theme": {
    "images": {
      "theme_frame": "header1.png"
    },
    "colors": {
      "frame": "#0013de",
      "tab_background_text": "#00d0ff"
    }
  },
  "version": "2.0",
  "name": "Blue And Blacker",
  "manifest_version": 2,
  "description": "My first persona. Simply trying out new FireFox features. At least, new-to-me features."
}