Examine source code of Blue Slant

{
  "name": "Blue Slant",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "background_firefox.png"
    },
    "colors": {
      "frame": "rgba(10, 31, 40, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgb(0, 25, 36)",
      "bookmark_text": "rgb(2, 164, 228)",
      "toolbar_field": "rgba(5, 10, 20, 1)",
      "toolbar_field_text": "rgb(0, 93, 130)",
      "tab_line": "rgb(2, 164, 228)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6fb43836-5696-4eeb-9328-6b90c5db567c}"
    }
  }
}