Comment 1 for bug 1923090

Indeed this failure started happening on armhf recently (I'd say about a week ago or so) for all builds of firefox, affecting not just hirsute but also xenial, bionic, focal and groovy.

The google search URL that's printed suggests a race condition: selenium doesn't have a built-in method to wait until the current URL changes to a given value, instead it allows watching the URL until it changes from the current value. This combined with a slow test environment might explain why the google redirection (to their consent popup) happens before the real search URL is captured by the test.