[Bug]: Dashboard in Dark Mode isn't working correctly in Firefox

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Dashboard in Dark Mode isn't working correctly in Firefox:

I'm using the NextCloud docker container, if it matters.

Steps to reproduce

1. Install Firefox
2. Install Nextcloud
3. Navigate to Nextcloud and set Dark Mode
4. Observe

Expected behavior

The dark icons and "Good morning" section should be in light colored text.

Nextcloud Server version

32

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

{
    "system": {
        "htaccess.RewriteBase": "\/",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "cloud.dowardindustries.com",
            "192.168.2.0\/24"
        ],
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "32.0.6.1",
        "overwrite.cli.url": "https:\/\/cloud.dowardindustries.com",
        "overwriteprotocol": "https",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "default_phone_region": "US",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": 1,
        "mail_smtpport": "587",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "loglevel": 2,
        "maintenance": false,
        "maintenance_window_start": 5,
        "memories.db.triggers.fcu": true,
        "memories.exiftool": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/exiftool-amd64-glibc",
        "memories.vod.path": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/go-vod-amd64",
        "memories.ffmpeg_path": "\/var\/raid\/bin\/ffmpeg",
        "memories.ffprobe_path": "\/var\/raid\/bin\/ffprobe",
        "enabledPreviewProviders": [
            "OC\\Preview\\Image",
            "OC\\Preview\\HEIC",
            "OC\\Preview\\TIFF",
            "OC\\Preview\\Movie"
        ],
        "memories.gis_type": 1,
        "app_install_overwrite": [],
        "memories.vod.disable": false,
        "memories.vod.ffmpeg": "\/opt\/bin\/ffmpeg",
        "memories.vod.ffprobe": "\/opt\/bin\/ffprobe",
        "preview_max_x": 2048,
        "preview_max_y": 2048,
        "preview_max_filesize_image": 8192,
        "opcache.memory_consumption": 128,
        "theme": ""
    }
}

List of activated Apps

Enabled:
  - activity: 5.0.0
  - admin_audit: 1.22.0
  - app_api: 32.0.0
  - calendar: 6.2.1
  - circles: 32.0.0
  - cloud_federation_api: 1.16.0
  - collectives: 3.6.1
  - comments: 1.22.0
  - contacts: 8.3.4
  - contactsinteraction: 1.13.1
  - dashboard: 7.12.0
  - dav: 1.34.2
  - deck: 1.16.3
  - drawio: 3.1.2
  - federatedfilesharing: 1.22.0
  - files: 2.4.0
  - files_accesscontrol: 3.0.2
  - files_confidential: 4.0.0
  - files_downloadlimit: 5.0.0-dev.0
  - files_pdfviewer: 5.0.0
  - files_reminders: 1.5.0
  - files_sharing: 1.24.1
  - files_trashbin: 1.22.0
  - files_versions: 1.25.0
  - firstrunwizard: 5.0.0
  - forms: 5.2.4
  - groupfolders: 20.1.12
  - integration_gitlab: 4.0.0
  - logreader: 5.0.0
  - lookup_server_connector: 1.20.0
  - mail: 5.7.1
  - memories: 7.8.2
  - nextcloud_announcements: 4.0.0
  - notes: 4.13.0
  - notifications: 5.0.0
  - oauth2: 1.20.0
  - password_policy: 4.0.0
  - photos: 5.0.0
  - previewgenerator: 5.12.1
  - privacy: 4.0.0
  - profile: 1.1.0
  - provisioning_api: 1.22.0
  - quota_warning: 1.23.0
  - recognize: 10.0.7
  - recommendations: 5.0.0
  - related_resources: 3.0.0
  - richdocuments: 9.0.3
  - richdocumentscode: 25.4.901
  - serverinfo: 4.0.0
  - settings: 1.15.1
  - sharebymail: 1.22.0
  - support: 4.0.0
  - survey_client: 4.0.0
  - suspicious_login: 10.0.0
  - systemtags: 1.22.0
  - tables: 1.0.4
  - text: 6.0.1
  - theming: 2.7.0
  - twofactor_backupcodes: 1.21.0
  - twofactor_totp: 14.0.0
  - updatenotification: 1.22.0
  - user_status: 1.12.0
  - viewer: 5.0.0
  - weather_status: 1.12.0
  - webhook_listeners: 1.3.0
  - whiteboard: 1.5.6
  - workflowengine: 2.14.0
Disabled:
  - bruteforcesettings: 5.0.0 (installed 2.7.0)
  - cloud_py_api: 0.2.0 (installed 0.2.0)
  - duplicatefinder: 1.7.3 (installed 1.7.3)
  - encryption: 2.20.0 (installed 2.19.0)
  - federation: 1.22.0 (installed 1.21.0)
  - files_external: 1.24.1 (installed 1.19.0)
  - mediadc: 0.4.0 (installed 0.4.0)
  - spreed: 22.0.9 (installed 22.0.9)
  - tasks: 0.17.1 (installed 0.17.1)
  - twofactor_nextcloud_notification: 6.0.0
  - user_ldap: 1.23.0 (installed 1.22.0)

Nextcloud Signing status

"No errors have been found."

Nextcloud Logs

N/A

Additional info

No response

Start in the dashboard app and reproduce the dark-mode view in Firefox using the reported steps. Inspect the dashboard icons and “Good morning” section for the styling that causes the incorrect colors, then verify that both render with readable light text in dark mode.