Examine source code of mountain

{
  "name": "mountain",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "wp4676582-4k-pc-wallpapers(2).jpg"
    },
    "colors": {
      "frame": "rgba(65, 116, 235, 1)",
      "tab_background_text": "rgba(68, 0, 255, 1)",
      "toolbar": "rgba(38, 11, 191, 1)",
      "bookmark_text": "rgba(68, 0, 255, 1)",
      "toolbar_field": "rgba(114, 82, 255, 0)",
      "toolbar_field_text": "rgba(68, 0, 255, 1)",
      "tab_line": "rgba(23, 46, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ee8c5e3b-3e2e-4fa0-93f2-2464c11b4e1f}"
    }
  }
}