Examine source code of Semalt Extension

{
  "name": "Semalt",
  "short_name": "Semalt",
  "description": "Watching and analyzing your keywords position by time.",
  "author": "Semalt",
  "version": "0.3.4resigned1",
  "offline_enabled": false,
  "manifest_version": 2,
  "browser_action": {
    "name": "Semalt Keywords Extension",
    "default_popup": "popup.html",
    "default_icon": "img/logo-ext16.png"
  },
  "commands": {
    "toggle-extension": {
      "suggested_key": {
        "default": "Alt+S"
      },
      "description": "Toggle Extension",
      "global": true
    },
    "_execute_browser_action": {
      "suggested_key": {
        "windows": "Alt+S",
        "mac": "Alt+S",
        "chromeos": "Alt+S",
        "linux": "Alt+S"
      }
    }
  },
  "icons": {
    "16": "img/logo-ext16.png",
    "64": "img/logo-ext64.png",
    "128": "img/logo-ext128.png"
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "storage",
    "cookies",
    "tabs",
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d42d4a5c-df7e-425f-84bd-d5b9669c2b49}"
    }
  }
}