Mark this tab!

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Mark this tab!",
  "description": "Extension which marks your tabs and you can find it",
  "version": "0.1.2",
  "manifest_version": 3,
  "permissions": [
    "contextMenus",
    "activeTab",
    "scripting",
    "storage",
    "webNavigation"
  ],
  "background": {
    "service_worker": "js/background.js"
  },
  "action": {},
  "icons": {
    "48": "/icons/48.png",
    "128": "/icons/128.png",
    "512": "/icons/512.png"
  },
  "commands": {
    "mark_tab": {
      "suggested_key": {
        "linux": "Alt+T",
        "windows": "Alt+T",
        "mac": "MacCtrl+Command+T"
      },
      "description": "Mark tab with default mark"
    }
  }
}