How can you do it then? I've tried but failed...story of my life!!
Its very easy. If you use Firefox:
Go to: Tools, then Options, then Content. In the "Content" you will see "Enable Java script", which will be ticked by default. Click "Advanced". You will see other options there. In the box: "Disable or replace context menu" will be a tick (usually is- by default) Untick it!
! Restart the browser.
When next time you click on the picture, or click on the expanded picture, usual Copyright warning will come up, click again and then you will see the menu where you can save the photo, search on Tineye (if you have a plugin installed), etc.