Examine source code of AMOLED Black Planet

{
  "name": "AMOLED Black Planet",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "2117820-3840x2160-desktop-4k-dark-background.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(150, 150, 150, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(150, 150, 150, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(150, 150, 150, 1)",
      "tab_line": "rgba(69, 69, 69, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{43539a79-1b5e-45a0-90f8-c52351c4a60e}"
    }
  }
}