In the past InterestExplorer used to include a Chrome browser extension that highlighted targetable interests inside Facebook Audience Insights. This extension is no longer available.
As a result of the migration from Facebook Audience Insights to the new Facebook Business Suite Insights, the use-case and the value of the extension has been taken away.
NOTE: If you still have the extension installed you might receive warnings like the one below, because it's no longer an active extension in the Chrome webstore. It's recommended to uninstall it from your Chrome browser.