Examine source code of OpenStreetMap Tags Editor

{
  "manifest_version": 2,
  "name": "OpenStreetMap Tags Editor",
  "version": "1.4",
  "description": "Adds an \"edit tags\" button to every object on osm.org.",
  "icons": {
    "48": "osmtags-48.png",
    "96": "osmtags-96.png",
    "128": "osmtags-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.openstreetmap.org/*"
      ],
      "js": [
        "osmorg-editor.js",
        "osm-auth.iife.min.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "sidebar-listener.js"
    ],
    "persistent": false
  },
  "web_accessible_resources": [
    "land.html",
    "land.js"
  ],
  "permissions": [
    "storage",
    "webNavigation"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "osmorg-editor@ilya.zverev.info"
    }
  }
}