If you use Etsy, You will want this

If you use Etsy as a seller and you use Firefox as it only works with Firefox you will want these 2 things. First you will want to add on Greasemonkey to your add ons then go here http://www.etsyhacks.com/

This is awesome it lets you have enhanced options on Etsy such as buyer convo you can delete them, send email, you can heart and unheart shoppes, you can get forum wrangler which lets you see when an admin posts something important and more. I love it. There is a zoom option for pics sort of like Ebay enlarge thingy and a copy button that allows you to relist multiples of the same item without rewriting it all and more more more :)