How do you uninstall the companion app?

[lake-effect]

Your question

It looks like uninstall isn't documented.

Addon & CoApp version and details

version: 9.3.7.2
target: mozilla
channel: stable
lang: en-US
coapp: {"found":true,"path":"/Applications/net.downloadhelper.coapp.app/Contents/MacOS/vdhcoapp","version":"2.0.19","new_version":false}
license: {"unset":true}
platform: aarch64 mac
UA: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:138.0) Gecko/20100101 Firefox/138.0
{
"privacy_accept": true,
"used_history_button": true,
"never_show_no_incognito_msg_again": true,
"view_options": {
"all_tabs": false,
"low_quality": false,
"sort_by_status": true,
"sort_reverse": false,
"show_button_clean": true,
"show_button_clean_all": false,
"show_button_convert_local": false,
"hide_downloaded": false
},
"open_count_store": 19,
"successfull_dl": 11
}

[GrampaWildWilly]

I do not work for VDH. I'm just another user.

Look in the CoApp directory & list all the available files. I think you'll find your answer quickly enough. However, to uninstall anything, not just the CoApp, I would highly recommend Revo Uninstaller. Oh wait. Revo appears to be only for Windows. OK. Scratch that idea. But my first comment still applies.