Examine source code of PixelPlan Injection

{
  "manifest_version": 2,
  "name": "PixelPlan Injection",
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "version": "1.6.8.1",
  "browser_action": {
    "default_icon": "plan-injection-icon.png"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "plan-injection.js"
      ],
      "matches": [
        "https://plan.pixelplus.ru/*"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "128": "plan-injection-icon.png"
  },
  "permissions": [
    "tabs",
    "https://plan.pixelplus.ru/*",
    "storage",
    "activeTab"
  ]
}