Examine source code of PageSieve

{
  "manifest_version": 2,
  "name": "PageSieve",
  "version": "1.5.0",
  "description": "PageSieve is a browser extension that assists with the extraction of structured data from any webpage you visit. Define field names, CSS selectors and (optionally) pagination strategy through a sidebar and extract and export data in a variety of formats.",
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "optional_permissions": [
    "nativeMessaging"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "browser_specific_settings": {
    "gecko": {
      "id": "{b9136a04-6556-40a5-bfa9-eb3ceb22e20d}",
      "data_collection_permissions": {
        "required": [
          "websiteContent",
          "websiteActivity"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": {
      "32": "icons/icon32.png",
      "64": "icons/icon64.png",
      "128": "icons/icon128.png"
    },
    "default_title": "PageSieve"
  },
  "sidebar_action": {
    "default_panel": "sidebar.html",
    "default_icon": {
      "32": "icons/icon32.png",
      "64": "icons/icon64.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*",
        "ftp://*/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}