Examine source code of Zrownys Random Bubbles

{
  "theme": {
    "images": {
      "theme_frame": "header.JPG"
    },
    "colors": {
      "frame": "#7a7a7a",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Zrownys Random Bubbles",
  "manifest_version": 2,
  "description": "Just some bubbles i made to test this out and practice bubble-making in Photoshop."
}