Examine source code of BlueLiteBlocker

{
  "manifest_version": 2,
  "name": "BlueLiteBlocker",
  "version": "0.0.0.10",
  "description": "Filter tweets from Twitter Blue users without having to block or mute them.",
  "icons": {
    "48": "icons/logo-48.png",
    "128": "icons/logo-128.png"
  },
  "options_ui": {
    "page": "settings.html",
    "browser_style": true
  },
  "browser_action": {
    "default_area": "navbar",
    "default_icon": {
      "128": "icons/logo-128.png"
    },
    "default_popup": "settings.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "bluelitefilter@malwaretech.com",
      "strict_min_version": "57.0"
    }
  },
  "web_accessible_resources": [
    "xhr_hook.js"
  ],
  "background": {
    "scripts": [
      "extension.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "injector.js"
      ]
    }
  ]
}