See changes there: https://www.mozilla.org/en-US/thunderbird/52.1.0/releasenotes/
This update brings a lot of changes, for complete list see https://www.mozilla.org/en-US/thunderbird/52.0/releasenotes/
This update has been submitted for testing by xhorak.
This update has obsoleted thunderbird-52.0-1.fc24, and has inherited its bugs and notes.
This update has been pushed to testing.
no regressions noted
This update has reached 7 days in testing and can be pushed to stable now if the maintainer wishes
This update has been obsoleted by thunderbird-52.2.0-1.fc24.
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This update has been submitted for testing by xhorak.
This update has obsoleted thunderbird-52.0-1.fc24, and has inherited its bugs and notes.
This update has been pushed to testing.
no regressions noted
This update has reached 7 days in testing and can be pushed to stable now if the maintainer wishes
This update has been obsoleted by thunderbird-52.2.0-1.fc24.