Examine source code of Animated lava

{
  "name": "Animated lava",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "ezgif.com-gif-maker(5).png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(171, 171, 171, 1)",
      "toolbar": "rgba(0, 0, 0, 0.28)",
      "bookmark_text": "rgba(191, 57, 0, 1)",
      "toolbar_field": "rgba(79, 79, 79, 0.52)",
      "toolbar_field_text": "rgba(255, 68, 0, 1)",
      "tab_line": "rgba(94, 94, 94, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{786000f1-9ee6-4544-8b87-0ff13c9d3d83}"
    }
  }
}