Clear my NSFW history

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Clear my NSFW history",
  "version": "1.0.1",
  "description": "Clean all nsfw websites from browser's history",
  "author": "medzhidov",
  "manifest_version": 2,
  "icons": {
    "16": "icons/16.png",
    "24": "icons/24.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png",
    "256": "icons/256.png",
    "512": "icons/512.png"
  },
  "permissions": [
    "background",
    "storage",
    "history"
  ],
  "browser_action": {
    "default_icon": "icons/512.png",
    "default_title": "Clear my NSFW history",
    "default_popup": "pages/popup.html"
  },
  "background": {
    "persistent": false,
    "page": "pages/background.html"
  },
  "options_page": "pages/options.html",
  "offline_enabled": true,
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'"
}