This popular Chrome and Firefox plugin / extension / addon requires an application to be installed on the system to handle some of it's functionality. https://www.downloadhelper.net/install-coapp The source code for the companion application is GPL-v2 licensed, and available on github. https://github.com/mi-g/vdhcoapp
I am asking to create an ebuild for this package too.
This application works without standart installation. The https://www.downloadhelper.net/install-coapp?browser=firefox page has both an targz archive and installation instructions. I now have a fully working extension without ebuild and standart installation.
I tried to compile this project from source today, the build.sh script tried to install npm into /usr/lib64 - maybe this won't ever work with gentoo package manager?