Examine source code of ASVZ

{
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "58.0",
      "id": "{e3e79d88-00b4-47db-b140-6524d03179e5}"
    }
  },
  "manifest_version": 2,
  "name": "ASVZ",
  "version": "2.2.4",
  "description": "Improve ASVZ features!",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.asvz.ch/*"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "storage",
    "cookies",
    "webRequest",
    "webRequestBlocking",
    "https://*.asvz.ch/"
  ],
  "browser_action": {
    "default_icon": "icon48.png",
    "default_title": "ASVZ",
    "default_popup": "popup.html"
  }
}