Wix is currently running a beta called Wix Code, which allows you to install third party javascript on your Wix website.

This allows you to install Mouseflow on your Wix site.

You can find instructions on how to install third party code on your Wix site here. Note that you should select the 'Body - end' option, in the 'Place Code In' field.

After you've signed up for a Mouseflow account, Mouseflow will automatically generate a custom tracking code for your website. Use this custom tracking code when applying external code to your Wix site.

As always, your custom tracking code can be found in-app: