Examine source code of TrollBlock

{
  "manifest_version": 2,
  "name": "trollblock",
  "version": "2.3resigned1",
  "description": "Personal Comment Block on germany.ru",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "64": "icons/icon-64.png"
  },
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/icon-64.png",
    "default_title": "Trollblock",
    "default_popup": "popup/dialog.html"
  },
  "applications": {
    "gecko": {
      "id": "@trollblock",
      "strict_min_version": "53.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://foren.germany.ru/*",
        "*://groups.germany.ru/*"
      ],
      "js": [
        "content_scripts/block.js"
      ]
    }
  ]
}