My Firefox says that this site is an "untrusted connection". Obviously it's not, but how do I know for sure? I'm in Canada, so it forwarded me to
www.perfectpen.ca - which I've heard of before, and I know is OK.
What is the best way to handle these? I want to make sure my computer is safe, but if I've heard of sites through people I trust (i.e. posters here

), how do I proceed?