This is a suggestion that I would very much like to see in the new Edge browser. I keep open a lot of tabs. Pretty much the only reason I have stuck with firefox is that I like how once enough tabs are open you can start to scroll to the right or left to see them. I don't like that on other browsers the tabs gets smaller and smaller until you don't know which is which unless you hover over each.
Please provide an option to be able to scroll through tabs.
