The current set of system tests require a very specific build environment to in order to run successfully and this environment has proven to be difficult to reproduce leaving us with constant failures, flappers, and a development environment that's different from the actual test execution environment.

By moving the system tests to use the test containers framework, including running Selenium and Firefox in containers, we hope to streamline the development and execution of system tests.

Work is currently being targeted for the develop branch. Once stable we can evaluate back-porting the changes as far back as necessary.