Examine source code of Ficradar

{
  "manifest_version": 2,
  "name": "ficradar",
  "description": "Discover top fanfics from public recommendations and forum activity.",
  "version": "2.0.0",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ficradar@Jemeni11.github.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "storage",
    "https://forum.questionablequesting.com/members/*.*",
    "https://forums.spacebattles.com/members/*.*",
    "https://forum.spacebattles.com/members/*.*",
    "https://forums.sufficientvelocity.com/members/*.*",
    "https://forum.sufficientvelocity.com/members/*.*"
  ],
  "browser_action": {
    "default_title": "FicRadar",
    "default_popup": "popup.html"
  }
}