Examine source code of SpaceX Theme

{
  "manifest_version": 2,
  "name": "SpaceX Theme",
  "author": "Kristijan Rosandić",
  "description": "Theme for SpaceX Fans that goes with 'SpaceX Animated New Tab' extension",
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "images/2048x120.png",
      "theme_toolbar": "images/2048x120-2.png",
      "theme_ntp_background": "images/2048x1149.png"
    },
    "colors": {
      "tab_text": [
        255,
        255,
        255
      ],
      "tab_background_text": [
        204,
        204,
        204
      ],
      "button_background": [
        0,
        0,
        0,
        0
      ],
      "toolbar": "rgb(0, 18, 38)",
      "toolbar_text": "rgba(255, 255, 255, 0.8)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{db777f43-9f21-488e-87d2-24f0f957c6ad}"
    }
  }
}