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Twitter post by Daniel Feldman (@d_feldman): Linux is the only major operating system to support diagonal mode (credit [Twitter] @xssfox). Image shows an untrawide monitor rotated about 45 degrees, with a horizontal IDE window taking up a bottom triangle. A web browser and settings menu above it are organized creating a window shape almost like a stepped pyramid.
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Product owners, you mean. They are the ones that determine support level of browser and as a result, what testers focus on. Devs don’t focus on things that aren’t a priority because otherwise they’re working on that on the evenings and weekends free of charge.