Got an e-mail in from a Firefox Facts reader named TommyD. He wanted to know if I knew of any simple ways to send a link or page to a second Firefox window. To show you what a good sport I am I’ll give you three ways of getting that done.
With just a new context menu added to your Firefox browser you can open any links in an existing window with the over obviously named OpenInWindow extension. When you right-click the link you can pick which of your open Windows to send it over to. This is handy if you have a lot of open windows and wish to pass links between them.
Now you can also do this another way, with no need for an extension or addon. Just drag the tab for the site you wish to move over to the new window. In doing so – you will be not just moving the page over, you will be sending a copy of that page to the other Firefox window you have open.
Last, but not least – you can right click any link, and by default Firefox has a "Open in New Window" option there for you to give this page you open it’s very own Window to work in. There you have it, three fixes for one simple problem.