It's a challenging issue; Extensions run in multiple contexts. As such, some gaps in support may be realized in the browser's engine, the browser's chrome, or i

It's a challenging issue; Extensions run in multiple contexts. As such, some gaps in support may be realized in the browser's engine, the browser's chrome, or in UX/UI artifacts. We have been researching ways to more easily test extensions, and will continue to explore this in the future.