Github Tab Size Manager

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Github Tab Size Manager",
  "version": "1.5",
  "manifest_version": 2,
  "icons": {
    "128": "images/icon.png"
  },
  "options_page": "options.html",
  "description": "Use this extension to view git files with tab size specified",
  "permissions": [
    "storage",
    "*://gist.github.com/*",
    "*://github.com/*",
    "tabs",
    "webNavigation"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://github.com/*",
        "*://gist.github.com/*"
      ],
      "js": [
        "js/jquery-3.1.1.min.js",
        "js/content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_security_policy": "script-src 'self' https://www.google-analytics.com; object-src 'self'"
}