I've been looking for something like this, that is fast and easy to use, and highly customizable. The add-on lets you click on a small cross in the top right corner of various elements on the web-page, should you chose to remove them from the final printed (or pdf) version. YOU, as the user, get to decide what you want or don't want in the document.

You can also send the version immediately by email to someone, without all the interim processes such as opening pdf, checking it, naming it, opening your emails, attaching it, etc.

If your work requires things such as frequent exchange of online articles with someone, and you like to keep electronic backups (instead of just weblinks), this saves a lot of time and helps you focus on doing the actual work instead of playing around with pdf and email settings half the time.

However, this add-on occasionally omits small details, such as tables. Shit happens. It's still the best and most reliable tool I have found.