Examine source code of md_5 squad

{
  "manifest_version": 2,
  "name": "md_5 squad",
  "version": "1.1resigned1",
  "description": "The md_5 squad!!!11!",
  "icons": {
    "16": "md_5.png",
    "48": "md_5.png",
    "128": "md_5.png"
  },
  "browser_action": {
    "default_icon": "md_5.png"
  },
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "md_5.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "js": [
        "md_5.js"
      ],
      "matches": [
        "https://www.spigotmc.org/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{851cfb1c-4da1-44e6-bde3-7a41bea794f5}"
    }
  }
}