To enable structure based dearch in your browser updated version of java needs to be installed on your system.

(I)MOZILLA FIREFOX BROWSER (MAC-SYSTEM)

Open the Firefox browser or restart it, if it is already running

From the Firefox menu, select Tools, then click the Add-ons option

From the Firefox menu, select Tools, then click the Add-ons option

In the Add-ons Manager window, select Plugins

Click Java Applet Plug-in (Mac OS X) to select it. Check that the option selected is Ask to Activate or Always Activate or on older Firefox versions

(II) MOZILLA FIREFOX BROWSER (WINDOWS-SYSTEM)

Open the Firefox browser or restart it. The plugin will be nlocked and ask for activation and permissions as shown below

Further for both systems next steps are same as displayed below

Click on appropriate buttons as shown below

Additional permissions are required sometimes

Structure drawing tool will be ready to function on your browser