Examine source code of PreConnect

{
  "manifest_version": 3,
  "name": "PreConnect",
  "short_name": "PreConnect",
  "description": "PreConnect as a browser extension for BRACU students.",
  "version": "1.6.7.16000",
  "version_name": "1.6.7.16000",
  "action": {
    "default_title": "Open PreConnect",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "background": {
    "service_worker": "background.dart.js",
    "scripts": [
      "background.dart.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "preconnect@sabbirba.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "alarms",
    "cookies",
    "sidePanel",
    "commands",
    "contextMenus",
    "notifications",
    "scripting",
    "unlimitedStorage",
    "storage",
    "tabs",
    "webNavigation",
    "gcm"
  ],
  "side_panel": {
    "default_path": "index.html"
  },
  "sidebar_action": {
    "default_panel": "index.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "PreConnect"
  },
  "commands": {
    "open_side_panel": {
      "suggested_key": {
        "default": "Ctrl+Shift+P",
        "mac": "Command+Shift+P"
      },
      "description": "Open PreConnect"
    },
    "open_custom_schedule": {
      "suggested_key": {
        "default": "Ctrl+Shift+1",
        "mac": "Command+Shift+1"
      },
      "description": "Open Custom Schedule"
    },
    "open_friends_schedule": {
      "suggested_key": {
        "default": "Ctrl+Shift+2",
        "mac": "Command+Shift+2"
      },
      "description": "Open Friend's Schedule"
    },
    "open_share_schedule": {
      "suggested_key": {
        "default": "Ctrl+Shift+3",
        "mac": "Command+Shift+3"
      },
      "description": "Open Share Schedule"
    }
  },
  "host_permissions": [
    "<all_urls>"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self';"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png",
    "192": "icons/icon-192.png",
    "512": "icons/icon-512.png"
  }
}