In order to support tablets completely, we can't rely on "right-click". Tablets don't have mouse.
It relies on it.
Right-Click. (maybe a menu is shown)
Firefox 58 and Windows7 HomePremium SP1 64bit
A lot of things would have to be changed for this, but it is a good point. However, I can't think of many ways that you could implement a right-click style menu while keeping everything as simple.
Double-click instead (or tap)?
FYI scratch-blocks uses long-press for right-click behaviour on touch devices.
Here are the different context menus I know about:
Closing since we have long press anywhere we have a custom context menu
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A lot of things would have to be changed for this, but it is a good point. However, I can't think of many ways that you could implement a right-click style menu while keeping everything as simple.