Years ago, Chrome included an experimental vertical side tabs feature. It was great. Worked perfectly. But, it disappeared one day. People created a bug on the tracker to get it restored. It got thousands of stars. It kept getting closed and re-opened and kept accumulating more and more stars. Eventually, someone at Google stepped in and said "we don't like how it looks. We have no other solution. But, we don't like how vertical side tabs look, so we will never permit them in Chrome." and ever since, if you want to open more than half a dozen tabs in Chrome you either need a monitor that's 9 feet wide or you use Firefox with the magnificent TabTree extension which is the correct solution to the problem.