Examine source code of Bouncing Ball Animation

{
  "theme": {
    "images": {
      "theme_frame": "FirefoxPersona-BLZ-Ball-Anim-header.png"
    },
    "colors": {
      "frame": "#808080",
      "tab_background_text": "#ffff00"
    }
  },
  "version": "2.0",
  "name": "Bouncing Ball Animation",
  "manifest_version": 2,
  "description": "Animated PNG (apng) graphic file with a bouncing blue ball animation on a blue gradient background with yellow text.  Displays best with a 1200 pixel wide browser or larger.  \n\nTo rate or comment, login here:\n<a href=\"https://addons.mozilla.org/en-US/firefox/addon/bouncing-ball-animation/#id=215011\" rel=\"nofollow\">https://addons.mozilla.org/en-US/firefox/addon/bouncing-ball-animation/#id=215011</a> \nSee all my persona designs here:\n<a href=\"https://addons.mozilla.org/en-US/firefox/collections/BrianZ/personas/\" rel=\"nofollow\">https://addons.mozilla.org/en-US/firefox/collections/BrianZ/personas/</a> \n\n(c) 2010, All Rights Reserved."
}