A firefox security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: firefox-88.0-1.fc33

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Fedora Update Notification
FEDORA-2021-5ed46601f6
2021-04-21 21:39:57.068437
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Name : firefox
Product : Fedora 33
Version : 88.0
Release : 1.fc33
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 upstream version (88.0)
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ChangeLog:

* Mon Apr 19 2021 Martin Stransky - 88.0-1
- Update to 88.0
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References:

[ 1 ] Bug #1950997 - Firefox 88.0 available
  https://bugzilla.redhat.com/show_bug.cgi?id=1950997
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-5ed46601f6' 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