Up and Down

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "description": "Save time and effort with keyboard shortcuts when navigating lists online.",
  "version": "0.0.10",
  "name": "Up and Down",
  "options_page": "options.html",
  "background": {
    "page": "background.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.google.com/*",
        "https://mail.google.com/*",
        "https://news.ycombinator.com/*",
        "https://hn.algolia.com/*",
        "https://bookface.ycombinator.com/*",
        "https://www.reddit.com/*",
        "https://www.twitter.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "upDownContentScript.bundle.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon-34.png"
  },
  "icons": {
    "128": "icon-128.png"
  },
  "manifest_version": 2,
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "permissions": [
    "storage"
  ]
}