Examine source code of Contextual Tab Groups - Group tabs by context

{
  "manifest_version" : 3 ,
  "version" : "1.7.2",
  "action" : {
    "default_popup" : "popup.html",
    "default_icon" : "icons/tab_islands.png"
  },
  "author": "Spooky Kipper",
  "homepage_url" : "https://spooky.hk/",
  "icons" : {
    "32" : "icons/tab_islands32.png",
    "64" : "icons/tab_islands64.png",
    "128" : "icons/tab_islands128.png"
  },
  "permissions" : [
    "tabs" ,
    "tabGroups" ,
    "storage" ,
    "unlimitedStorage" 
  ],
  "options_ui" : {
    "page": "options.html" ,
    "open_in_tab": true
  },
  "commands" : {
    "newTabInGroup": {
      "description" : "New tab in Group / Create a new group",
      "suggested_key": {
        "default": "Alt+T"
      }
    }
  },
  "name" : "Contextual Tab Groups - Group tabs by context",
  "description" : "Group tabs by context for you automatically. Inspired by Opera One.",
  "background" : {
    "scripts" : [
      "background.js" 
    ],
    "type" : "module" 
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tabislands@spookysrv.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}