Examine source code of Custom Redirects

{
  "manifest_version": 2,
  "name": "Custom Redirects",
  "version": "2.1.0",
  "description": "Automatically redirect URLs with your own rules. Match addresses using simple wildcards or full regular expressions, reuse captured parts with $1, $2, and toggle each rule on or off. Includes a built-in tester.",
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{073f8f7e-ed8b-45fd-a5d1-58fe9db41ad3}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "src/redirect.js",
      "src/background.js"
    ]
  },
  "browser_action": {
    "default_title": "Custom Redirects",
    "default_popup": "src/popup.html",
    "default_icon": {
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png"
    }
  }
}