Method 1

Create a favourite with the URL below, whenever the right click is disabled, click on the favourite.

javascript:void(document.onmousedown=null);void(document.onclick=null);void(document.oncontextmenu=null)

Method 2

When you right click on an object you get a box poping up to say right click is disabled, or something to that effect.

1. Do not close the box, move the box so the 'OK' button is over where you want to right click.
2. Press the left mouse button and hold, now press and hold the right button and hold.
3. Now let go of the left button, then the right button.
4. Now the right click menu should appear.