Examine source code of Xpather

{
  "manifest_version": 2,
  "name": "__MSG_EXTENSION_NAME__",
  "description": "__MSG_EXTENSION_DESCRIPTION__",
  "version": "1.0.0",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "scripting",
    "webNavigation",
    "<all_urls>"
  ],
  "commands": {
    "toggle-picker": {
      "suggested_key": {
        "default": "Ctrl+Shift+X",
        "mac": "Command+Shift+X"
      },
      "description": "__MSG_COMMAND_TOGGLE_PICKER__"
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "xpather@xpather.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "sidebar_action": {
    "default_panel": "popup.html?sidepanel=1",
    "default_title": "__MSG_EXTENSION_NAME__",
    "default_icon": {
      "16": "icons/16.png",
      "32": "icons/32.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Xpather",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content-scripts/content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}