I use this feature on the accordion buttons many times every day, e.g. when switching between the Ecommerce UI, Repositories, Data Integration and/or the SQL Firehose, and it's great for productivity. However, the latter three are in the Settings section, so in DW9, only one of them can be active in multitasking (great feature btw). I would greatly appreciate the "Open in new window" back or some other feature that allows me to have multiple active pages simultaneously in Settings. If it should be a multi browser tab solution, it would be a huge benefit, if the tabs were name something else than "Dynamicweb Admin", as I tend to get confused by too many identical tabs:)
