Examine source code of StayPinned

{
  "manifest_version": 2,
  "name": "StayPinned",
  "version": "1.0.0",
  "description": "Maintain consistent pinned tabs.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{8fc0c154-a049-4746-bdfb-54fad8b0e966}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "32": "assets/icon.png",
    "64": "assets/icon@2x.png",
    "128": "assets/icon@4x.png",
    "256": "assets/icon@8x.png",
    "512": "assets/icon@16x.png",
    "1024": "assets/icon.svg"
  },
  "developer": {
    "name": "cnnrro",
    "url": "https://github.com/cnnrro/StayPinned"
  },
  "homepage_url": "https://github.com/cnnrro/StayPinned"
}