add extension link n screenshots.

src/index.html

@@ -270,7 +270,7 @@
 				<div>
 					<p>Made by <a href="https://twitter.com/chinchang457" target="_blank">Kushagra Gour</a></p>
 					<p>Tweet out your feature requests, comments & suggestions to <a href="https://twitter.com/chinchang457">@chinchang457</a>.</p>
-					<p>If you like this extension, support it by <a href="">writing a review here</a>.</p>
+					<p>If you like this extension, support it by <a href="https://chrome.google.com/webstore/detail/lkfkkhfhhdkiemehlpkgjeojomhpccnh/" target="_blank">writing a review here</a>.</p>
 				</div>
 			</div>
 		</div>