Twitter Customizer

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Twitter Customizer",
  "version": "1.2.0",
  "short_name": "TC",
  "description": "Use your own GIF, PNG, or JPEG image to replace Twitter's logo and favicon.",
  "manifest_version": 3,
  "permissions": [
    "declarativeContent",
    "storage"
  ],
  "icons": {
    "16": "assets/images/no_more_doge_16.png",
    "32": "assets/images/no_more_doge_32.png",
    "48": "assets/images/no_more_doge_48.png",
    "128": "assets/images/no_more_doge_128.png"
  },
  "background": {
    "service_worker": "assets/scripts/background.js"
  },
  "content_scripts": [
    {
      "matches": [
        "*://twitter.com/*",
        "*://*.twitter.com/*"
      ],
      "js": [
        "assets/scripts/contentScript.js"
      ],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_popup": "popup.html"
  }
}