Examine source code of Informatics copy tests

{
  "manifest_version": 2,
  "name": "Informatics copy tests",
  "version": "0.2",
  "description": "Adds a button for copying tests on https://informatics.msk.ru/",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://informatics.msk.ru/mod/statements/view.php?id*"
      ],
      "js": [
        "copy-button.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3cb76d78-7aa9-411a-b3d7-567d3fc2bb51}"
    }
  }
}