Examine source code of regex-redirect

{
  "manifest_version": 2,
  "name": "regex-redirect",
  "version": "1.0",
  "description": "Host redirection extension for firefox",
  "icons": {
    "48": "icons/regex-redirect.svg",
    "96": "icons/regex-redirect.svg"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/regex-redirect.svg",
    "default_title": "regex-redirect",
    "default_popup": "popup/main.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e461f05f-0ccc-4b90-afcf-570885fa9cd4}"
    }
  }
}