the screen sporadically darkens OR the navigation drop-down freezes while working

[sameen]

Smartgwt version-6.0

The application is getting freeze for a while with Browser = Firefox ESR 52.5.0 (64-bit). And dropdowns are not loading after that until we restart Firefox.

Please help me to get rid out of this issue. Any help/suggestion would be appreciate

[Isomorphic]

Your application code is most likely simply crashing. Start with elementary troubleshooting steps, such as checking for JS errors, and looking in the Developer Console for errors or warnings.