Merlin
<view-source>

<view-source>

View source code of online HTML, CSS & JavaScript files

Merlin
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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "<view-source>",
  "version": "1.1.0",
  "description": "View source code of online HTML, CSS & JavaScript files",
  "icons": {
    "128": "assets/icons/icon-128.png"
  },
  "permissions": [
    "*://*/*",
    "notifications"
  ],
  "browser_action": {
    "default_icon": {
      "16": "assets/icons/icon-16.png",
      "24": "assets/icons/icon-24.png",
      "32": "assets/icons/icon-32.png"
    },
    "default_title": "<view-source>",
    "default_popup": "app/popup/index.html"
  },
  "options_ui": {
    "chrome_style": true,
    "page": "app/options/index.html"
  },
  "background": {
    "scripts": [
      "app/scripts/event.js"
    ],
    "persistent": false
  },
  "content_security_policy": "script-src 'self' https://code.jquery.com/ https://cdnjs.cloudflare.com/; object-src 'self'"
}