Examine source code of MrtkiBlock

{
  "name": "MrtkiBlock",
  "description": "Blokování hnoje na webu",
  "version": "0.99.91",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_end",
      "js": [
        "myscript.js"
      ]
    }
  ],
  "icons": {
    "16": "assets/icon16.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage",
    "tabs"
  ]
}