Rated 5 out of 5 stars

Good job,I love it!
非常感謝!!!

建議增加一個調整“Recently Closed Tabs”個數的選項
像History Submenus 一樣

This review is for a previous version of the add-on (2.0.2.1-signed). 

about:config

browser.sessionstore.max_tabs_undo