This is something I plan to use for quickly inserting Markdown links. I create a new bookmarklet in my browser toolbar with the following location property...
javascript:void(prompt("","["+document.title+"]("+location.href+")"));
... now when I want to insert a link to an open web page I click the bookmarklet and copy and paste the title and link into emacs or my Markdown Textarea.
This one inserts reference-style links...
javascript:rc=prompt("refcode(e.g. '1'","");void(prompt("","["+document.title+"]["+rc+"]["+rc+"]:%20"+location.href));