Examine source code of Request Modifier

{
  "manifest_version": 2,
  "name": "Request Modifier",
  "version": "1.1",
  "description": "修改指定域名的POST请求，在URL参数中添加clientVersion参数，支持清理指定域名的cookie",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "requestHeaders",
    "storage",
    "cookies",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Request Modifier",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ebe620c9-3dee-42dc-bdee-d940d69e82bb}"
    }
  }
}