QuoteCollapse 0.7 by Michael J Gruber Categories Message Reading Collapse and expand quotes. Please see the extension homepage for... 4 reviews Updated November 15, 2005 802 weekly downloads 73,676 total downloads How to Install in ThunderbirdRight-click the link below and choose "Save Link As..." to download and save the file to your hard disk.In Mozilla Thunderbird, open Add-ons from the Tool