评分4星,满分5星

Toggle Quotes adds a toolbar button and a shortcut key to QuoteCollapse.
https://addons.mozilla.org/en-US/thunderbird/addon/toggle-quotes/

这个评论是针对附加组件的一个早期版本的(0.9)。 

This does not appear to be a review of QuoteCollapse.
I don't mind linking to that add-on-add-on from the description or even integrating functionality.