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added reminder to rerun or backfill release tasks
Sometimes builds and tests need to be retriggered. For some classes of automation/infrastructure failures, this happens automatically and the job is marked in the [https://treeherder.mozilla.org/userguide.html Treeherder UI] as dark blue. For other cases, or if you're doing investigative work e.g. testing for an intermittent failure, you'll need to retrigger the job manually.
'''Retriggering''' a job will cause the certain test to be run again.
<span style="color:#D00">Tasks which belong to the release process to actually ship a build to users must not be retriggered or backfilled else the task chain will break. These tasks can be found e.g. on beta and release trees. Examples are the "UV" or "Snap" tasks. If a task name at the bottom left of treeherder starts with "release-", it's a release task. If you are unsure about it, ask in [https://chat.mozilla.org/#/room/#firefox-ci:mozilla.org Firefox CI] on Matrix.</span>
