Examine source code of Viral Tweet Filter

{
  "manifest_version": 2,
  "name": "Viral Tweet Filter",
  "version": "0.2.6",
  "description": "Filters Tweets based on a customizable threshold of likes/retweets.",
  "icons": {
    "48": "icons/vtf-48.png",
    "96": "icons/vtf-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://twitter.com/",
        "*://twitter.com/home*"
      ],
      "js": [
        "src/content_scripts/viraltweetfilter.js"
      ]
    }
  ],
  "page_action": {
    "default_title": "Viral Tweet Filter",
    "default_popup": "src/page_actions/config.html",
    "default_icon": {
      "19": "icons/vtf-19.png",
      "38": "icons/vtf-38.png"
    },
    "show_matches": [
      "*://twitter.com/home*"
    ]
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6366a74b-ca40-48bc-83d9-ad8406780c1f}"
    }
  }
}