Examine source code of MultiLinkOpener

{
  "manifest_version": 2,
  "name": "MultiLinkOpener",
  "version": "1.0",
  "description": "Guardar y abre enlaces con un solo clic.",
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7a03000d-c546-489b-9be9-1f0656bd771b}"
    }
  }
}