Clearing the web browser cache should remove ETAgs.
Pants, who created the Ghacks user.js file, discovered some time ago that this was no longer the case in Firefox.
He noticed that Firefox was not deleting ETAg data anymore when she cleared the cache of the browser, something that Firefox did before that time.
https://www.ghacks.net/2017/12/09/a-sol ... n-firefox/
Is Pale Moon affected by this?