Backed out for causing failures on browser_tab_groups. [Push with failures](https://treeherder.mozilla.org/jobs?repo=autoland&resultStatus=pending%2Crunning%2Csuccess%2Ctestfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel&revision=981144874a19547ce41aecb4fd2cfac9be0ea985&test_paths=browser%2Fcomponents%2Ftabbrowser%2Ftest%2Fbrowser%2Ftabs%2Fbrowser.toml&group_state=expanded&selectedTaskRun=GYMVMMlRTuie8kfG3-yIcA.0) [Failure log](https://treeherder.mozilla.org/logviewer?job_id=579768669&repo=autoland&task=GYMVMMlRTuie8kfG3-yIcA.0) [Backout link](https://hg.mozilla.org/integration/autoland/rev/5f8411901e3e)
Bug 2051545 Comment 4 Edit History
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Backed out for causing failures on browser_tab_groups. Please fix also Bug 2056414 and Bug 2056407 before relanding. [Push with failures](https://treeherder.mozilla.org/jobs?repo=autoland&resultStatus=pending%2Crunning%2Csuccess%2Ctestfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel&revision=981144874a19547ce41aecb4fd2cfac9be0ea985&test_paths=browser%2Fcomponents%2Ftabbrowser%2Ftest%2Fbrowser%2Ftabs%2Fbrowser.toml&group_state=expanded&selectedTaskRun=GYMVMMlRTuie8kfG3-yIcA.0) [Failure log](https://treeherder.mozilla.org/logviewer?job_id=579768669&repo=autoland&task=GYMVMMlRTuie8kfG3-yIcA.0) [Backout link](https://hg.mozilla.org/integration/autoland/rev/5f8411901e3e)