Examine source code of XMaster: Power Tools for X (Twitter)

{
  "manifest_version": 2,
  "name": "__MSG_extension_name__",
  "short_name": "__MSG_extension_short_name__",
  "description": "__MSG_extension_desc__",
  "default_locale": "en",
  "version": "1.1.2",
  "version_name": "1.1.2.released",
  "icons": {
    "16": "media/img/icons/icon-16.png",
    "48": "media/img/icons/icon-48.png",
    "96": "media/img/icons/icon-96.png",
    "128": "media/img/icons/icon-128.png",
    "256": "media/img/icons/icon-256.png",
    "512": "media/img/icons/icon-512.png"
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "downloads",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "service_worker.js"
    ],
    "persistent": false,
    "type": "module"
  },
  "browser_action": {
    "default_icon": {
      "16": "media/img/icons/icon-16.png",
      "48": "media/img/icons/icon-48.png",
      "96": "media/img/icons/icon-96.png",
      "128": "media/img/icons/icon-128.png",
      "256": "media/img/icons/icon-256.png",
      "512": "media/img/icons/icon-512.png"
    }
  },
  "web_accessible_resources": [
    "media/img/*"
  ],
  "content_scripts": [
    {
      "css": [],
      "js": [
        "media/js/lib/jst.js",
        "media/js/lib/jscs.js",
        "media/js/opts.js",
        "media/js/client.js"
      ],
      "matches": [
        "https://*.x.com/*",
        "https://*.twitter.com/*"
      ],
      "exclude_matches": [
        "https://*/*.txt",
        "https://*/*.png",
        "https://*/*.jpg",
        "https://*/*.jpeg",
        "https://*/*.gif",
        "https://*/*.xml",
        "https://*/*.svg",
        "https://*/*.manifest",
        "https://*/*.log",
        "https://*/*.ini"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{06083f45-aba6-42ab-a51d-b3660211ab31}"
    }
  }
}