Hi ravi.bhatt, reply from developer : "Stockzoom is not an alternative way to zoom images on iStockphoto, it is just an enhancement. We have to wait for iStockphoto to restore zooming of images on their pages." https://addons.mozilla.org/en-us/firefox/addon/stock-zoom/?src=search https://addons.mozilla.org/en-US/firefox/addon/stock-zoom/reviews/379406/ https://addons.mozilla.org/en-US/firefox/addon/stock-zoom/reviews/380150/ thank you