Firefox snap not updating.

[Porter Gurdon Leete]

I've been updating my snaps using the command line. But today, I received a notification saying that firefox has a pending update. I tried using the command `sudo snap refresh`, in the terminal window, but it says that all snaps are up-to-date. I check whether the notification is legit, and sure enough, there was a security notice saying that bugs were fixed in Firefox on April 12:

https://ubuntu.com/security/notices/USN-6010-1

I try running the automatic software updater, but it says that all software is up-to-date.

Release of Ubuntu: Ubuntu 22.04.2 LTS
Firefox version 112.0

Output of snap --version:
snap 2.58.3
snapd 2.58.3
series 16
ubuntu 22.04
kernel 5.19.0-38-generic

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: snapd 2.58+22.04
ProcVersionSignature: Ubuntu 5.19.0-38.39~22.04.1-generic 5.19.17
Uname: Linux 5.19.0-38-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu82.4
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 14 11:46:55 2023
InstallationDate: Installed on 2023-03-08 (37 days ago)
InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Snap.Changes: no changes found
SourcePackage: snapd
UpgradeStatus: No upgrade log present (probably fresh install)