Examine source code of Blues Graphic

{
  "name": "Blues Graphic",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(5, 3, 4, 1)",
      "tab_background_text": "rgba(31, 226, 252, 1)",
      "toolbar": "rgba(5, 3, 4, 0)",
      "bookmark_text": "rgba(32, 232, 250, 1)",
      "toolbar_field": "rgba(5, 3, 4, 0.03)",
      "toolbar_field_text": "rgba(27, 227, 245, 1)",
      "tab_line": "rgba(27, 227, 245, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1cddb626-2e49-45c1-9ea3-397f647c33b3}"
    }
  }
}