Examine source code of Task Extractor

{
  "manifest_version": 2,
  "name": "Task Extractor",
  "version": "1.3",
  "description": "Extracts actionable tasks, to-dos, and deadlines from any webpage.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/logo_64.png",
    "default_title": "Task Extractor",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{230329ae-70c1-4c8f-9a59-e98f451fe4d8}"
    }
  }
}