Did you ever have the problem that you needed information from two websites at once and had to switch between them all the time to access them ? I usually have the problem when I write a new article for Ghacks and have to take a look at another website to find the information that I need for my article. This gets extremely irritating if many tabs are open at once and I miss the tab that I want. To much clicks in my opinion, that is why I was searching for a way to display two websites next to each other in Firefox.

