Repl.it

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Repl.it",
  "version": "0.9",
  "description": "Run code across the web on repl.it",
  "icons": {
    "128": "icon.png"
  },
  "content_scripts": [
    {
      "js": [
        "index.js"
      ],
      "matches": [
        "https://gist.github.com/*/*",
        "https://www.npmjs.com/package/*",
        "https://github.com/*/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "menu.js"
    ],
    "persistent": false
  },
  "permissions": [
    "contextMenus",
    "tabs",
    "activeTab",
    "storage"
  ]
}