Plasma 5.13 offers browser integration. Installing the extension from the Firefox store gives an error, as I have not installed the host connector. However the package 'plasma-browser-integration' is not in the KDE Neon repositories.
I have this problem https://i.imgur.com/h7nEGqW.png
This is fixed now, plasma-browser-integration is available under user edition.
Sorry if this is a dumb question, but I'm in 5.12 and can't find the `plasma-browser-integration` package. Is 5.12 not supported?
@Isaac: plasma-browser-integration is a new feature of Plasma 5.13.