Examine source code of SLE Extension

{
  "name": "Sandro Linux Extension",
  "short_name": "SLE",
  "description": "An extension which lets you access my content",
  "version": "2.8",
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "Command+MacCtrl+S"
      }
    }
  },
  "developer": {
    "name": "Oscar Sanderson"
  },
  "manifest_version": 2,
  "icons": {
    "48": "images/sandrolinuxicon48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.sandrolinux.com/*"
      ],
      "js": [
        "scripts/extension.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "images/icon.png",
    "default_popup": "pages/popup.html",
    "default_title": "Click for access to links to my content"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fabc61c8-d52e-43a2-827b-983cafb6962c}"
    }
  }
}