Examine source code of Tool Hub

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.0.8",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "https://sleekaddons.com/api/tools/search"
  ],
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{0e5c6f70-25d7-460c-8d36-5575129a8d8b}"
    }
  },
  "browser_action": {
    "default_popup": "popup.html"
  }
}