Examine source code of Temporary Tab Container

{
  "browser_action": {
    "browser_style": true,
    "default_title": "tabContainer",
    "default_popup": "context.html",
    "default_icon": {
      "128": "icon128.png"
    }
  },
  "homepage_url": "https://github.com/sagitta1618/temporaryTabContainer",
  "manifest_version": 2,
  "name": "tabContainer",
  "version": "1.3.0",
  "permissions": [
    "tabs",
    "contextualIdentities",
    "contextMenus",
    "cookies",
    "activeTab",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "icons": {
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "openNewContainer": {
      "suggested_key": {
        "default": "Ctrl+Shift+F"
      },
      "description": "Send a 'openNewTCtab' event to the extension"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7b5c3b96-01b3-48d8-a019-cdc24c31befb}"
    }
  }
}