Examine source code of FileMinify

{
  "manifest_version": 2,
  "name": "FileMinify",
  "version": "1.0.2",
  "description": " Kostenlose Bildkomprimierung Online - JPEG, PNG, PDF & Video verkleinern ",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "browser_action": {
    "default_title": "FileMinify"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "downloads"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "open-tab-addon@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}