Shoot the Messenger

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Shoot the Messenger",
  "description": "This extension sequentially unsends all messenges in a messenger chain.",
  "version": "6.0.2",
  "content_scripts": [
    {
      "matches": [
        "http://*.messenger.com/*",
        "https://*.messenger.com/*"
      ],
      "js": [
        "main.js"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "submitSearch.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "background": {
    "service_worker": "background.js"
  },
  "action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "http://*.messenger.com/*",
    "https://*.messenger.com/*"
  ],
  "icons": {
    "128": "icon.png"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  }
}