Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.
One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.
http://lifehacker.com/#!127960/bookmark-and-open-multiple-tabs-in-firefox
Otherwise, if you are always opening the same tabs, then you can that the same group of webpages open as homepages:
http://support.mozilla.com/en-US/kb/Multiple%20tabs%20open%20when%20starting%20Firefox
Thanks.
mug