After launching the browser, a message is displayed:

Failed to connect to the native host. Make sure the 'plasma-browser-integration' package is installed.

Of course browser addon and package "plasma-browser-integration" are installed.

This only happens with chrome, with firefox I have no problems and the integration is working

    2 months later

    Refreshing the thread
    I reported a bug at bugs.kde.org. Here's what the answer was recently: link

    Thanks for the link, plasma-browser-integration will be adjusted so it will keep the chrome files in /etc/opt. Tested here that it works then without error messages. You can test too by copying /opt/google/chrome-unstable/native-messaging-hosts to /etc/chrome.

    OK, so I copied /opt/google/chrome-unstable/native-messaging-hosts to /etc/chrome (I had to create it because it did not exist). Unfortunately, no effect. Did I skip something?

    Praise the Lord. At last it works. Thank you very much.

    5 days later

    demm Should I copy those files or those will come in a future package ?

      The fix is up in the [build] repo, plasma-browser-integration 5.13.90-2, contemplating to move Plasma 5.14RC to stable, there really are no issues with it.....

      6 years later

      Please start a new thread, this is way too old to be the same issue, it is not even the same Desktop anymore.
      Closing this old thread.

      demm locked the discussion .