Examine source code of Abstracticus

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#9472fc",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Abstracticus",
  "manifest_version": 2,
  "description": "permission obtained to use this image taken by velvetoni. a retro style diner with \"bright line\" edits by torcado. theme by paradoxrevolver."
}