Examine source code of RicePDF

{
  "manifest_version": 2,
  "version": "1.2.1",
  "name": "RicePDF",
  "short_name": "RicePDF",
  "description": "Custom PDF reader with diffrent color themes.",
  "author": "Yash Bhondave",
  "homepage_url": "https://github.com/yhcb21/RicePDF",
  "browser_specific_settings": {
    "gecko": {
      "id": "ricepdf@yhcb21.github.io",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "webNavigation",
    "<all_urls>",
    "downloads",
    "search"
  ],
  "background": {
    "scripts": [
      "scripts/mv2/background.js"
    ],
    "type": "module",
    "persistent": false
  },
  "options_ui": {
    "page": "pages/options.html"
  },
  "web_accessible_resources": [
    "pdfjs/web/viewer.html"
  ],
  "content_security_policy": "script-src 'self' 'wasm-unsafe-eval'",
  "page_action": {
    "browser_style": true,
    "default_icon": "images/link.svg",
    "default_title": "Get original link to PDF",
    "default_popup": "pages/popup.html"
  },
  "browser_action": {
    "default_icon": "images/icon32.png",
    "default_title": "Open PDF Reader in New Tab"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "mac": "MacCtrl+Q",
        "default": "Alt+Q"
      },
      "description": "Open PDF Reader in New Tab"
    }
  }
}