Examine source code of Remove Twitter Auth Modal

{
  "description": "Removes twitter's authentication modal, allowing to browse twitter privately",
  "manifest_version": 2,
  "name": "Remove Twitter Modal",
  "version": "1.1",
  "homepage_url": "https://github.com/sofiyevsr/remove-twitter-modal",
  "icons": {
    "48": "icons/modal.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "js": [
        "remove-twitter-modal.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0986b3f9-c24e-4dad-8a22-066205d9c51a}"
    }
  }
}