Ouch!! We are bringing back click to delete very soon.

You can install the previous version (3.2.0) from here - https://addons.mozilla.org/en-US/firefox/addon/print-friendly-pdf/versions/ and disable auto update

Regarding the images, can you email support@printfriendly.com links that are not working well in the new version?

Edit: We have just released 4.2.0 which has "Click To Delete" similar to the previous version.