A firefox security update has been released for Fedora 31.

SECURITY: Fedora 31 Update: firefox-75.0-1.fc31

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Fedora Update Notification
FEDORA-2020-5967b8cd4e
2020-04-09 18:17:41.487101
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Name : firefox
Product : Fedora 31
Version : 75.0
Release : 1.fc31
URL :   https://www.mozilla.org/firefox/
Summary : Mozilla Firefox Web browser
Description :
Mozilla Firefox is an open-source web browser, designed for standards
compliance, performance and portability.

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Update Information:

- New Firefox and NSS upstream update - More info at   https://www.mozilla.org/en-
US/firefox/75.0/releasenotes/
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ChangeLog:

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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2020-5967b8cd4e' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys