Whenever I click on an emailto: contatc link, Firefox starts opening hundreds of blank tabs that can't be stopped and freeze the computer.
I use gmail in the browser, and don't have a mail program set up on my Mac. Whenever I click a contact link that goes directly to an email, Firefox opens hundreds of tabs in succession. It gets up to the thousands sometimes. I usually have to force quit and restart the whole computer because Firefox stays as the dominant program and won't let me click through to anything else.