User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727) Build Identifier: Ability to attach notes to Bookmarks. For example, if you visit a site where you always need to enter your "Order Number", instead of going to your email or documents to get the order number, it would be handy if you could save the order number along with the bookmark. This way, visiting the bookmark, you can open up the note and copy and paste the information as you require. This could be a simple text box. Reproducible: Always Steps to Reproduce: 1. 2. 3.
see http://wiki.mozilla.org/Places:Bookmarks:Rethinking (at the bottom). Bug 374525 is more concerned with tags though, but the free-form notes should be part of it too.