Add "search the url at hn/reddit/hatena" context menu by automator on OSX. Fore more info, see: http://good-morning-call.com/2012/05/20/mac%E3%81%AE%E5%8F%B3%E3%82%AF%E3%83%AA%E3%83%83%E3%82%AF%E3%83%A1%E3%83%8B%E3%83%A5%E3%83%BC%E3%81%AB%E9%A0%85%E7%9B%AE%E3%82%92%E8%BF%BD%E5%8A%A0%E3%81%99%E3%82%8B%E6%96%B9%E6%B3%95/

hn-reddit-hatena-search.applescript

set urlList to {"http://b.hatena.ne.jp/entry/", "https://www.reddit.com/submit?url=", "https://hn.algolia.com/?sort=byPopularity&prefix&page=0&dateRange=all&type=story&query="}
set numURLs to (count urlList)
open location (item 1 of urlList) & (get the clipboard)
tell application "Safari"
	activate
	tell window 1
		repeat with i from 2 to (numURLs)
			set current tab to (make new tab)
			set URL of document 1 to (item i of urlList) & (get the clipboard)
		end repeat
	end tell
end tell