CoApp not recognized in LibreWolf (Firefox derivative)

[PEHamel]

Your question

Running MacOS Big Sur (Version 11.7.10).

LibreWolf recently re-installed to latest version via Homebrew.

Tried to download a video using VDH. Tells me I need the CoApp.

Downloaded and ran the CoApp PKG file:

CoApp not recognized in LibreWolf.

In Terminal, ran the install:

/Applications/net.downloadhelper.coapp.app/Contents/MacOS/vdhcoapp install
Installing…
Writing /Users/eric/Library/Application Support/Mozilla/NativeMessagingHosts/net.downloadhelper.coapp.json
Writing /Users/eric/Library/Application Support/Chromium/NativeMessagingHosts/net.downloadhelper.coapp.json
Writing /Users/eric/Library/Application Support/Google/Chrome Canary/NativeMessagingHosts/net.downloadhelper.coapp.json
Writing /Users/eric/Library/Application Support/Google/Chrome/NativeMessagingHosts/net.downloadhelper.coapp.json
Writing /Users/eric/Library/Application Support/BraveSoftware/Brave-Browser/NativeMessagingHosts/net.downloadhelper.coapp.json
VdhCoApp : VdhCoApp is ready to be used

CoApp still not recognized in LibreWolf.

Checked Firefox to see if recognized there. It is. Works fine.

From Firefox VDH settings page:

version: 8.2.1.1
channel: stable
build date: 2024-02-19
build options: linuxlic: false, noyt: false, browser: firefox
lang: en-US
license: accepted
key (only 16 first characters): 3ffe11f2c3ee4a08
platform: x86-64 mac
UA: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:123.0) Gecko/20100101 Firefox/123.0
coapp: yes. Info:
{
"id": "net.downloadhelper.coapp",
"name": "VdhCoApp",
"version": "2.0.19",
"binary": "/Applications/net.downloadhelper.coapp.app/Contents/MacOS/vdhcoapp",
"displayName": "VdhCoApp",
"description": "Video DownloadHelper companion app",
"target": {
"os": "mac",
"arch": "x86_64",
"node": "18"
},
"home": "/Users/eric",
"converterBinary": "/Applications/net.downloadhelper.coapp.app/Contents/MacOS/ffmpeg",
"converterBase": "ffmpeg",
"converterBaseVersion": "n6.1-11-gc30f360955"
}

From LibreWolf VDH settings page:

version: 8.2.1.1
channel: stable
build date: 2024-02-19
build options: linuxlic: false, noyt: false, browser: firefox
lang: en-US
license: nocoapp
key (only 16 first characters): 3ffe11f2c3ee4a08
platform: x86-64 mac
UA: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:123.0) Gecko/20100101 Firefox/123.0
coapp: no.

Sounds like I need to copy net.downloadhelper.coapp.json somewhere. Can anybody tell me where?

Thanks.

Addon & CoApp version and details

From Firefox VDH settings page:

version: 8.2.1.1
channel: stable
build date: 2024-02-19
build options: linuxlic: false, noyt: false, browser: firefox
lang: en-US
license: accepted
key (only 16 first characters): 3ffe11f2c3ee4a08
platform: x86-64 mac
UA: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:123.0) Gecko/20100101 Firefox/123.0
coapp: yes. Info:
{
"id": "net.downloadhelper.coapp",
"name": "VdhCoApp",
"version": "2.0.19",
"binary": "/Applications/net.downloadhelper.coapp.app/Contents/MacOS/vdhcoapp",
"displayName": "VdhCoApp",
"description": "Video DownloadHelper companion app",
"target": {
"os": "mac",
"arch": "x86_64",
"node": "18"
},
"home": "/Users/eric",
"converterBinary": "/Applications/net.downloadhelper.coapp.app/Contents/MacOS/ffmpeg",
"converterBase": "ffmpeg",
"converterBaseVersion": "n6.1-11-gc30f360955"
}

From LibreWolf VDH settings page:

version: 8.2.1.1
channel: stable
build date: 2024-02-19
build options: linuxlic: false, noyt: false, browser: firefox
lang: en-US
license: nocoapp
key (only 16 first characters): 3ffe11f2c3ee4a08
platform: x86-64 mac
UA: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:123.0) Gecko/20100101 Firefox/123.0
coapp: no.

[FlailoftheLord]

I was having the same issue on Linux. The issue is with NativeMessaging. Librewolf extensions store their native messaging host configurations under the default directory ~/.mozilla but the browser reads them from its own ~/.librewolf directory, just copy the folder (.mozilla/native-messaging-hosts) over to librewolf's directory and it works.

[PEHamel]

Perfect! Thanks. Works like a charm.

To be clear, I copied the NativeMessagingHosts folder from ~/Library/Application Support/Mozilla/ to ~/Library/Application Support/LibreWolf/

[tfernsle]

I had the same problem with Waterfox on MacOS Catalina (10.15), and solved it by installing Firefox, re-installing VDHCoAPP, and then copying NativeMessagingHosts folder from the new mozilla folder to my Waterfox profile folder.