Examine source code of SellerPic

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.0.3",
  "icons": {
    "16": "assets/icons/icon16.png",
    "48": "assets/icons/icon48.png",
    "128": "assets/icons/icon128.png"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "notifications",
    "alarms"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "interestingservice@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "58.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.zierwa.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/worker-bridge.js"
      ]
    }
  ],
  "browser_action": {}
}