You need to open this page in a private window and close all private windows in between each section. Don't copy/paste the links, you need to click on them for the test cases to work.
Open a new tab and paste https://brave.com/?fbclid=1 in the URL bar. That parameter should be removed from the URL bar.
In all of these cases, the fbclid parameter should be missing from the landing page.
In all of these cases, the fbclid parameter should be present on the landing page, but the gclid parameter should be missing in the intermediate step (client-side redirection).
In all of these cases, the fbclid parameter should be present on the landing page.
After clicking on this button, the fbclid parameter should be present on the landing page.