ニコニコ動画のURLをコンテキストメニューからniconico://プロトコルに変換してタブを開き、不要なタブを閉じる（タブを閉じる動作がこのままでは機能しない？）

background.js

var NiocvideoContentIdRegex = /^https?:\/\/(?:www|live)\.nicovideo.jp\/watch\/((?:sm|lv|so)\d*|\d*)/;
var NiocvideoShortContentIdRegex = /^https?:\/\/nico.ms\/((?:sm|lv|so)\d*|\d*)/;

var TargetUrls = ["*://www.nicovideo.jp/*", "*://live.nicovideo.jp/*", "*://nico.ms/*"];

function isNiconicoUrlWithContentId(url)
{
	return NiocvideoContentIdRegex.test(url) || NiocvideoShortContentIdRegex.text(url);
}

function extractNiconicoContentId(url)
{
	var match = url.match(NiocvideoContentIdRegex);
	console.log("match -> " + match);
	if (match != null && match.length >= 2)
	{
		return match[1];
	}

	match = url.match(NiocvideoShortContentIdRegex);
	console.log("short match -> " + match);
	if (match != null && match.length >= 2)
	{
		return match[1];
	}
	return null;
	
}

function convertToNiconicoProtocolUrl(url)
{
	var contentId = extractNiconicoContentId(url);
	if (contentId != null)
	{
		return "niconico://" + contentId;
	}
	else 
	{
		return null;
	}
}

function OnTabCreated(tabInfo)
{
		console.log("tab id " + tabInfo.id);
		chrome.tabs.remove(tabInfo.id, () => 
		{
			if (chrome.runtime.lastError) {
				console.log("failed: " + chrome.runtime.lastError);
			} else {
				console.log("removed tab");
			}
		});

}


function OpenNiconicoProtocol(niocnicoUrl)
{
	chrome.tabs.create({url: niocnicoUrl, active:false}, OnTabCreated);
}


/*
ニコニコ動画で開くためのコンテキストメニュー
*/
chrome.contextMenus.create({
  id: "play",
  title: chrome.i18n.getMessage("contextMenuItemPlay"),
  contexts: ["link"],
	targetUrlPatterns: TargetUrls,
  onclick : (info, tab) => 
	{
		console.log(info);
		var niconicoUri = convertToNiconicoProtocolUrl(info.linkUrl);
		if (niconicoUri != null)
		{
			console.log("[PLAY] " + niconicoUri);

			OpenNiconicoProtocol(niconicoUri);
		}
	}
});

chrome.contextMenus.create({
  id: "separator",
  contexts: ["link"],
	targetUrlPatterns:TargetUrls,
  type: "separator"
});

chrome.contextMenus.create({
  id: "add-playlist",
  title: chrome.i18n.getMessage("contextMenuItemNicoAddToPlaylist"),
  contexts: ["link"],
	targetUrlPatterns:TargetUrls,
  onclick : (info, tab) => 
	{
		console.log(info.linkUrl);
		var niconicoUri = convertToNiconicoProtocolUrl(info.linkUrl);
		if (niconicoUri != null)
		{
			var niconicoUriWithAddPlaylist = niconicoUri + "?addplaylist=1"; 
			console.log("[Add Playlist] " + niconicoUriWithAddPlaylist);

			OpenNiconicoProtocol(niconicoUriWithAddPlaylist);
		}
	}
});

manifest.json

{

  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.0",

  "applications": {
    "gecko": {
      "id": "sample@tor4kichi"
    }
  },

  "permissions": [
    "http://*/*",
    "https://*/*",
    "tabs",
    "contextMenus",
    "webNavigation"
  ],

  "background": {
    "scripts": ["background/background.js"]
  },

  "default_locale": "ja"
}