Rocker gesture: Hold right mouse button while clicking left one opens context menu in Chrome as well

I defined a so-called rocker gesture: Keep right mouse button pressed while clicking the left one to execute keyboard command "CMD + W".
In Chrome this works fine but results in opening a context menu in Chrome as well when I release the left button again, so I have to click somewhere else to close the context menu.

Do you have any idea how to prevent chrome from opening the context menu?

As a workaround,

  1. click right button,
  2. move the mouse in any direction and then
  3. click left button.
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