Examine source code of Website Feed

{
  "manifest_version": 2,
  "name": "Website Feed",
  "version": "1.0",
  "description": "Aims to create a way to browse the internet on user-determined pages sequentially.",
  "homepage_url": "https://github.com/notmishi/website-feed-extension",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "activeTab",
    "bookmarks",
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "Website Feed",
    "default_popup": "popup/menu.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{1c6259c3-2966-4a61-a58e-5d8d41155fc2}"
    }
  }
}