Examine source code of BetterStuudium

{
  "manifest_version": 2,
  "name": "BetterStuudium",
  "version": "1.1",
  "description": "Kirjeldus.",
  "permissions": [
    "<all_urls>",
    "tabs"
  ],
  "icons": {
    "240": "stuudium-logo.png"
  },
  "browser_action": {
    "default_icon": "stuudium-logo.png",
    "default_title": "BetterStuudium",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.ope.ee/*"
      ],
      "js": [
        "js.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{03283019-229c-491e-a1f8-db4a9973b898}"
    }
  }
}