Examine source code of Redirect Rules

{
  "manifest_version": 2,
  "name": "Redirect Rules",
  "version": "2.1.4",
  "description": "Send matching web addresses to wherever you want with custom redirect rules. Use wildcard or regex matching with capture groups, enable or disable rules instantly, and preview the result for any URL before saving.",
  "icons": {
    "32": "graphics/icon-32.png",
    "48": "graphics/icon-48.png",
    "64": "graphics/icon-64.png",
    "96": "graphics/icon-96.png",
    "128": "graphics/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b299ed1f-595f-4b24-b11b-549e638047db}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "app/redirect.js",
      "app/background.js"
    ]
  },
  "browser_action": {
    "default_title": "Redirect Rules",
    "default_popup": "app/popup.html",
    "default_icon": {
      "32": "graphics/icon-32.png",
      "48": "graphics/icon-48.png",
      "64": "graphics/icon-64.png"
    }
  }
}