Sutare_extension shows a message on the browser window if the page is considered to be fairly old.
ページ内容が古いと思われるとき、それを警告するメッセージを表示します

Install

• License: BSD 2-Clause "Simplified" License
• Weekly downloads: 0
• Average daily users: 1
• Rating: 0/5 of 0 ratings
• Created: 2016-09-14 01:29:25
• Last updated: 2016-09-16 03:20:51
• Homepage: https://github.com/masui/SutareExtension
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/sutare_extension/
• API: sutare.extension@pitecan.com