Examine source code of LOR panel

{
  "manifest_version": 2,
  "name": "LOR panel",
  "version": "0.5",
  "description": "Simple navigation pane for linux.org.ru",
  "browser_specific_settings": {
    "gecko": {
      "id": "lorpa@tmnhy.su",
      "strict_min_version": "48.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.linux.org.ru/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "panel.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ]
}