Examine source code of Anti-Toxicity Twitter

{
  "manifest_version": 3,
  "name": "Anti-Toxicity Twitter",
  "version": "1.0",
  "description": "Twitter toxicity prevention",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "host_permissions": [
    "https://*.twitter.com/*",
    "https://*.x.com/*"
  ],
  "action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.twitter.com/*",
        "https://*.x.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "antitoxi@twitter.com",
      "strict_min_version": "109.0"
    }
  }
}