[Manozco]

It looks like Chrome is doing the pro software then.

Parent said blender was opening the menu onPress, which according to your comment is OK for pro software, Chrome is also doing the menu onPress

[capableweb]

Maybe it depends on the platform? For me, on Windows with Chrome, it only opens the context menu once you've stopped holding down the button. In Blender (on Windows), the menu opens as soon as you hold the button.