Examine source code of Review Rooms

{
  "manifest_version": 2,
  "name": "Review Rooms",
  "description": "Collaborative website review tool for teams. Review and comment on any site with a toolbar overlay.",
  "version": "1.1.1",
  "icons": {
    "16": "/icon/16.png",
    "32": "/icon/32.png",
    "48": "/icon/48.png",
    "96": "/icon/96.png",
    "128": "/icon/128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "scripting",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "review-rooms@adpharm.digital",
      "data_collection_permissions": {
        "privacy_policy": "https://github.com/adpharm/review-rooms-web-ext#privacy",
        "required": [
          "authenticationInfo",
          "websiteContent"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Default Popup Title",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}