Examine source code of mixershapes

{
  "theme": {
    "images": {
      "theme_frame": "Mozillathemecreator2.1.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#474444"
    }
  },
  "version": "2.0",
  "name": "mixershapes",
  "manifest_version": 2,
  "description": "I love to create such designs. and as opted here i want to build brand.\nThis is just a trial image i have uploaded and if i get positive response will upload the best i can"
}