Examine source code of Open in JOSM

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "author": "Piskvor",
  "description": "__MSG_extensionDescription__",
  "version": "1.1resigned1",
  "default_locale": "en",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "tabs"
  ],
  "icons": {
    "16": "icons/josm-16.png",
    "32": "icons/josm-32.png",
    "48": "icons/josm-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1205b01-d1ac-4eb4-9e91-286e755f3205}"
    }
  }
}