make links posted by users open in a new window
It always annoys me when I go to click a link on a Stack Exchange site within a question, comment, or answer and it targets the current tab, making it so I have to go back to return to the question I was on after going to another question or going to an external webpage.
All anchor tags should use target="_blank" by default. I'm sure it's quite possible, Gmail does it. I have just gotten in the habit of doing Ctrl + click so that it will open in a new tab.
I think this would be a good feature, because most of the time we don't want to leave the question we are on. We want to stay there, so we can answer the question. We just need to see the link in order to help answer the question.
It has just always been a pain trying to get back to questions we were on, so I propose that by default links in questions, comments, and answers open new tabs.