There are some a11y_checks that are intermittently failing on Autoland and pass on Try and vice versa. Also, a couple of tests are crashing while performing a11y_checks, thus they are to be skipped while we continue the investigation into each of them. Related bugs: - Fail-if tests: meta bug 1848402 - Explore capturing click events for a11y_checks: bug 1692110 Differential Revision: https://phabricator.services.mozilla.com/D190890