The root-level README file in Bugzilla advertises landfill.bugzilla.org as a place to place. That site doesn't exist anymore, so the link should be removed on all supported branches.
Bug 1545338 Comment 0 Edit History
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The root-level README file in Bugzilla advertises landfill.bugzilla.org as a place to play. That site doesn't exist anymore, so the link should be removed on all supported branches.