Examine source code of Fuzzy Tab Switcher

{
  "manifest_version": 3,
  "name": "Fuzzy Tab Switcher",
  "description": "Fast fuzzy search across all open tabs with Alt+K",
  "version": "1.1.2",
  "author": "Ruslan Gonzalez <ruslanguns@gmail.com>",
  "permissions": [
    "tabs",
    "storage"
  ],
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+K",
        "mac": "Alt+K"
      },
      "description": "Open the Fuzzy Tab Switcher popup"
    },
    "quick-switch": {
      "suggested_key": {
        "default": "Alt+Q",
        "mac": "Alt+Q"
      },
      "description": "Switch to the previously active tab"
    }
  },
  "action": {
    "default_popup": "src/popup.html",
    "default_icon": {
      "16": "icons/16.png",
      "48": "icons/48.png",
      "128": "icons/128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ruslan-fts@ruso.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}