Examine source code of Paste_Guard

{
  "manifest_version": 2,
  "name": "PasteGuard — Local Paste Redactor",
  "version": "0.2.3",
  "description": "Masks secrets and API keys on paste for LLM sites. 100% local.",
  "permissions": [
    "storage",
    "tabs",
    "webNavigation",
    "menus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_title": "PasteGuard",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "rules.js",
        "content_script.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    "sites.json"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "pasteguard@example.com",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}