Examine source code of Post Peek

{
  "manifest_version": 3,
  "name": "Post Peek",
  "version": "1.2.0",
  "description": "Read one X post and leave. Opens x.com and twitter.com post links in a popup, not the full site. No account, no cookies sent to X.",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://cdn.syndication.twimg.com/*",
    "https://pbs.twimg.com/*",
    "https://video.twimg.com/*"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "exclude_matches": [
        "https://x.com/*",
        "https://*.x.com/*",
        "https://twitter.com/*",
        "https://*.twitter.com/*"
      ],
      "js": [
        "src/popup-css.js",
        "src/content.js"
      ],
      "css": [
        "src/content.css"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "action": {
    "default_title": "Post Peek",
    "default_popup": "options/options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "post-peek@timvbs.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}