You are not logged in.
After selecting "Google search by image" in context menu nothing happens.
Offline
Where do I have to click to get this menu option?
Offline
Where do I have to click to get this menu option?
right-click on image - it's one of the options. Same problem for me too
Offline
Where do I have to click to get this menu option?
Right button click on image: 
Offline