This plugin gives you the option to tell a visitor they are using a browser that you don’t support. For example, if they come onto your website on Internet Explorer, you can give them the option to upgrade their web browser to a more up to date version.
To do this, log into your WordPress website and go to Plugins > Add New then type Advanced Browser Check.
Once installed and activated you can find it under Settings > Advanced Browser Checker.
In the plugin settings you can then change the titles, message, allow the user to hide the popup and continue on to your website, select what browsers you would like to link them to upgrade to, then you can select what browsers this pop up will appear on.
Once your settings are complete, simply select Save.