A follow needed from the JsonEditor work to add this to an individual field.

"Open URL in browser" right click action for the JsonEditor which is only meant to show with links. This is added in the default view otherwise (along with Copy field & value but this was not planned for JsonEditor anyways). Somewhat similar to the TableCell, because it's inside a third party editor it's a less straightforward setup and the effort required for a quite minor UX improvement seems not worth it but let me know if you think otherwise.