Firefox bypasses right-click blocking when you press shift.
What it doesn't bypass is websites placing transparent things on top of what you wish to right-click on (for example images on Twitter). For that I use Stylus to add CSS and move things away.
It's not about right-click bypassing, it's exactly about transparent things. ClearClick checks whether the image of what you click matches the image of element that's being clicked, shows you the preview and asks if you really want to click it. The best pre-WebExt feature of NoScript.
What it doesn't bypass is websites placing transparent things on top of what you wish to right-click on (for example images on Twitter). For that I use Stylus to add CSS and move things away.