clicking a link does it
MOSR and others are able to launch popups when you follow a link on their sites because Safari tries to allow a user to click links for popup windows for stuff like banking logins where it would be useful behavior.
When you find a site that's (ab)using this:
I've found that if you right-click and copy the link, then paste it into the address bar and hit return (instead of just clicking the link to go to the page), you avoid the popups at MOSR among others.
MOSR and others are able to launch popups when you follow a link on their sites because Safari tries to allow a user to click links for popup windows for stuff like banking logins where it would be useful behavior.
When you find a site that's (ab)using this:
I've found that if you right-click and copy the link, then paste it into the address bar and hit return (instead of just clicking the link to go to the page), you avoid the popups at MOSR among others.