Examine source code of Gimp online image editor

{
  "manifest_version": 3,
  "name": "__MSG_title__",
  "version": "2.9.4",
  "description": "__MSG_description__",
  "default_locale": "en",
  "action": {
    "default_popup": "index.html",
    "default_icon": "icons/suite_38.png"
  },
  "icons": {
    "16": "icons/suite_16.png",
    "48": "icons/suite_48.png",
    "128": "icons/suite_128.png"
  },
  "background": {
    "scripts": [
      "websecure.js"
    ]
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://*/*",
    "http://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{92a081b7-e33d-4f49-a82d-62cd703b9a81}"
    }
  }
}