FireFox takes ('clicks') the context menu item under the mouse (if applicable) when the right mouse button is released after opening the menu on press.
As a result, I frequently accidentally navigate 'back' instead of opening the menu (visibly) at all, since I must slightly move the mouse down and to the right before releasing.
I'm developing the habit of always holding down RMB and moving to the entry I actually wanted before releasing, but I don't like it.
Is it possible to disable this behaviour, so that only LMB (or at least a second RMB click) selects an entry from the context menu?
(This is similar, but is about macOS' system context menu; I am asking about FireFox's context menu, on Linux if relevant: How to show context menu on mouse up instead of mouse down?)