HTTP Request Blocker and Delayer

This's a devtools extension to introduce delay or blocking for http requests, based on configuration of URL patterns and delay time
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manifest.json
{
  "manifest_version": 2,
  "author": "Liang Shaozhan",
  "name": "HTTP Request Blocker and Delayer",
  "description": "This's a devtools extension to introduce delay or blocking for http requests, based on configuration of URL patterns and delay time",
  "version": "1.0.1",
  "icons": {
    "16": "logo.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "webRequest",
    "*://*/*",
    "webRequestBlocking"
  ],
  "devtools_page": "devtoolpage.html"
}