Examine source code of Twitter Ad Blocker

{
  "manifest_version": 2,
  "name": "Twitter Ad Blocker",
  "version": "1.1.0",
  "description": "Blocks promoted tweets from Twitter",
  "icons": {
    "16": "assets/icon16.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "author": "Darkempire78",
  "homepage_url": "https://github.com/Darkempire78/Twitter-Ad-Blocker",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*",
        "https://mobile.twitter.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  }
}