How to enable "Search Google for this image"?

[Tyger]

So Firefox is currently my browser of choice and I just had to fully "reset" it, and I subsequently seem to have lost the ability to right-click an image and "Search Google for this image", anyone know how to activate this? Appreciate I am not running Chrome but it definitely used to work in FF, and fairly sure the only nod to Google I had was it set as my homepage and little search bar at the top-right.

 

[G.T.Ace]

Do you mean this? https://addons.mozilla.org/en-US/firefox/addon/googlesearch-by-image/

 

[Tyger]

D'oh! Yes I did, totally don't remember an install. Thanks!