https://addons.mozilla.org/en-US/firefox/addon/4738 What does it do? Well if like me, you read a lot of articles on similar subjects on the web and you want to save them for future reference, you just hit add file and Loop makes a .pdf of the entire webpage. It gets better. Say you have several webpages on a similar subject and you'd really like to keep them all together. For example, I don't know, say Enterpriser threatens you with a gun and you want to keep a record of the entire conversation? You can save each page individually, or Loop will combine them all into one .pdf file. It gets better. Say you have web pages on a subject you like, plus you've already typed up some documents and have a bunch of photos as well. You can upload them to loop, and then convert them all into a single pdf document. It gets better. It's free.