Examine source code of Plaina

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#660a0a",
      "tab_background_text": "#06184d"
    }
  },
  "version": "2.0",
  "name": "Plaina",
  "manifest_version": 2,
  "description": "Find the active tab easily."
}