Examine source code of BruceTabs – Floating Tab Panels

{
  "manifest_version": 2,
  "name": "BruceTabs – Floating Tab Panels",
  "version": "1.0.0",
  "description": "Pop any browser tab into a clean, floating panel window. Perfect for keeping stock charts, videos, or references on top while you work.",
  "author": "Bruce",
  "homepage_url": "https://github.com/bruce/brucetabs",
  "browser_specific_settings": {
    "gecko": {
      "id": "brucetabs@brucetabs.extension",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/icon-48.svg",
    "96": "icons/icon-96.svg",
    "128": "icons/icon-128.svg"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.svg",
      "96": "icons/icon-96.svg"
    },
    "default_title": "Float this tab",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background/brucetabs_background.js"
    ],
    "persistent": false
  },
  "commands": {
    "float-current-tab": {
      "suggested_key": {
        "default": "Alt+Shift+F"
      },
      "description": "Float the current tab into a panel"
    },
    "restore-panel-tab": {
      "suggested_key": {
        "default": "Alt+Shift+R"
      },
      "description": "Restore floating panel back to a tab"
    }
  }
}