Choose another application for Http lists no installed Web browsers

"Thunderbird" does not exist in Ubuntu [As a Package Identifier]. Apport lists the executable path as Thunderbird's.
The Window titles Choose Application > Another Application, do not either. It is apparent I have looked in the wrong part of the Apport report for what is needed in the package field. I would like to learn more about this.

Note: there is a related bug I have uploaded with an Apport file that may point to a common underlying problem titled "Ubuntu Studio Settings Default Applications; lists no installed Web browsers" Bug #2006440

To Reproduce
1. Load Ubuntu Studio Ubuntu Studio 22.04
2. Open Thunderbird
3. Open a email form window
4. Enter a reasonable email address and title
5. Enter some text in the body
6. Click [send]
This pop up is displayed
--------------
Choose an Application to open the HTTP link.
Choose other Application [Choose]
-------------
Click [Choose]
Find not a list of applications as expected, but instead the general file system > Recent [list of files].
leaving the non-OS savvy user with the question, "How do I find one of these?"

For example in looking for the Firefox executable which I prefer,
I had to open Konsole, and
use whereis to find
Firefox: /snap/bin/Firefox
However finding out which of the following executables to select and [open]:
* Firefox,
* Firefox.geckodriver, or
* geckodriver
is information I have not yet to find in Ask.Ubuntu, Mozilla help or a general Google search, thus indicating an even more frustrating if not hopeless search for that "Non-OS savvy user" above.

While not a system stopper, I look forward to a fix for other users and myself of this Amazing OS and Set Of Applications that you magical people have created. That is, a fix that keeps some part of Ubuntu Studio from nagging myself and others to "Choose an Application to open the HTTP link." then not providing a way of doing it.

System Description
Operating System: Ubuntu Studio 22.04
KDE Plasma Version: 5.24.7
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: thunderbird 1:102.7.1+build2-0ubuntu0.22.04.1
ProcVersionSignature: Ubuntu 5.15.0-58.64-lowlatency 5.15.74
Uname: Linux 5.15.0-58-lowlatency x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.11-0ubuntu82.3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: luigi 3830 F.... pulseaudio
 /dev/snd/controlC1: luigi 3830 F.... pulseaudio
 /dev/snd/controlC0: luigi 3830 F.... pulseaudio
BuildID: 20230131132728
CasperMD5CheckResult: unknown
Channel: Unavailable
CurrentDesktop: KDE
Date: Mon Feb 6 22:42:44 2023
DefaultProfileExtensions: extensions.sqlite corrupt or missing
DefaultProfileIncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
DefaultProfileLocales: extensions.sqlite corrupt or missing
DefaultProfilePrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/thunderbird/omni.ja:greprefs.js:306
DefaultProfileThemes: extensions.sqlite corrupt or missing
ExecutablePath: /usr/lib/thunderbird/thunderbird
ForcedLayersAccel: False
InstallationDate: Installed on 2023-01-11 (26 days ago)
InstallationMedia: Ubuntu-Studio 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809)
IpRoute:
 default via 192.168.200.1 dev enp8s0 proto dhcp metric 100
 169.254.0.0/16 dev enp8s0 scope link metric 1000
 192.168.200.0/24 dev enp8s0 proto kernel scope link src 192.168.200.128 metric 100
Profile0Extensions: extensions.sqlite corrupt or missing
Profile0IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
Profile0Locales: extensions.sqlite corrupt or missing
Profile0PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/thunderbird/omni.ja:greprefs.js:306
Profile0PrefSources: prefs.js
Profile0Prefs:
 extensions.lastAppVersion: "102.7.1" (prefs.js)
 places.database.lastMaintenance: 1675739332 (prefs.js)
 privacy.purge_trackers.date_in_cookie_database: "0" (prefs.js)
Profile0Themes: extensions.sqlite corrupt or missing
Profiles:
 Profile1 (Default) - LastVersion=None/None (Out of date)
 Profile0 - LastVersion=102.7.1/20230131132728 (In use)
RunningIncompatibleAddons: False
SourcePackage: thunderbird
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/30/2022
dmi.bios.release: 5.26
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: 1.07.MS02
dmi.board.asset.tag: Default string
dmi.board.name: X670E Steel Legend
dmi.board.vendor: ASRock
dmi.board.version: Default string
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvr1.07.MS02:bd09/30/2022:br5.26:svnMicroElectronics:pnG905:pvr1.0:rvnASRock:rnX670ESteelLegend:rvrDefaultstring:cvnDefaultstring:ct3:cvrDefaultstring:sku521831:
dmi.product.family: PowerSpec
dmi.product.name: G905
dmi.product.sku: 521831
dmi.product.version: 1.0
dmi.sys.vendor: MicroElectronics