Actually no. It is in 2.7 , and has since been made synchronous  (so you possibly wait a little longer).But if you're using CodeServer rather than DevMode, you have to wait before loading the page; that code is only about enabling the "Launch Default Browser" and "Copy to Clipboard" buttons in the DevMode UI.
Ah I see, well I start SDM through IntelliJ which uses the DevMode class (with -noserver) and the browser is launched when everything is ready.
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