Examine source code of Batch Page Loader

{
  "name": "Batch Page Loader",
  "version": "1.1.2resigned1",
  "manifest_version": 2,
  "description": "Opens multiple pages with continuous numbering",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": "icon19.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs"
  ],
  "applications": {
    "gecko": {
      "id": "batchpageloader@ustat.de",
      "strict_min_version": "45.0"
    }
  }
}