The browser extensions do not require you to do any kind of configuration (like CORS),
but they need the browsers permission to "acces data for all websites" so they can access your cluster.
Elasticvue is available as a chrome extension:Chrome webstore
Elasticvue is available as a edge (2020) extension:Edge webstore
Elasticvue is available as a firefox addon:Firefox addon
If you use elasticvue via one of the following ways you will have to configure CORS to grant the browser access to your cluster.
You can use the hosted version of elasticvue to avoid installing anything.app.elasticvue.com
Check the readme for instructions on how to manually build elasticvue.
Checkout usage for details on how to configure your cluster to use elasticvue.