3PO#failとは何ですか？

3PO#failはhttps://www.phpied.comによって開発されたChromeの拡張機能で、その主な機能は「What happens to your site when 3rd party sites are down」です。

拡張機能のスクリーンショット

3PO#fail拡張機能のCRXファイルをダウンロード

3PO#fail拡張子のファイルをcrx形式でダウンロードし、ブラウザにChrome拡張機能を手動でインストールするか、crxファイルを友達と共有して簡単にChrome拡張機能をインストールします。

拡張機能の使用方法

See how your page loads when 3rd party JavaScript fails to load.

Example 3rd party scripts are those you include for social buttons like Facebook Like, Twitter, Google+ etc

Including these external JavaScripts in a blocking manner is a SPOF (Single Point Of Failure) for your site. This means an outage. You should always load these asynchronously.

Sites do go down. Even big ones. Or they fail to load for other reasons (e.g. corporate firewall blocking). You don't want your site to go down when a third party goes down.

// You want:
your outage = your outage

// as opposed to
you outage += Google outage + FB outage + Twitter outage + LinkedIn + .....

This extension helps you visualize the negative effects by redirecting recognized third party JavaScripts to a blackhole (http://blackhole.webpagetest.org).

The list of recognizes script include:

*://ajax.googleapis.com/*
*://apis.google.com/*
*://*.google-analytics.com/*
*://connect.facebook.net/*
*://platform.twitter.com/*
*://code.jquery.com/*
*://platform.linkedin.com/*
*://*.disqus.com/*

The extension stays dormant until you click the # icon. Then the extension starts listening to requests and blackholes the recognized ones. It shows a badge in the icon with how many scripts were blackholed and on mouseover shows you the URLs.

Regarding the name... 3PO = 3rd Party Optimization. And #fail is kinda obvious.

拡張機能の基本情報

名前	3PO#fail
ID	flodkodajoabgkfcgcengpkojhejfkfg
公式URL	https://chromewebstore.google.com/detail/3pofail/flodkodajoabgkfcgcengpkojhejfkfg
説明	What happens to your site when 3rd party sites are down
ファイルサイズ	43.77 KB
インストール数	30
現在のバージョン	1.0
最終更新日	2012-06-15
公開日	2012-06-15
開発者	https://www.phpied.com
支払い方法	free
対応言語	en
manifest.json
{ "update_url": "http:\/\/clients2.google.com\/service\/update2\/crx", "name": "3PO#fail", "version": "1.0", "icons": { "16": "icon-on.png", "48": "icon48.png", "128": "icon128.png" }, "description": "What happens to your site when 3rd party sites are down", "permissions": [ "webRequest", "webRequestBlocking", ":\/\/\/*" ], "background": { "scripts": [ "urls.js", "background.js" ] }, "browser_action": { "name": "fail", "default_title": "Click to blackhole 3rd parties", "default_icon": "icon-off.png" }, "manifest_version": 2 }