All of the required packages are installed yet they provide almost no functionality. I have both the plugins for Chromium and Firefox, and the plasma-browser-integration package. I can search for browser tabs for both Chromium and Firefox in KRunner, but that's about it. There are no widgets for the browsers' media players or notifications about downloads. I've restarted my computer several times, and reinstalled the browsers, their plugins, and the plasma-browser-integration package several times as well, to no avail. Versions: Kernel 4.17.12-1.1 Manjaro 17.1.11 KDE Plasma 5.13.4 Chromium 68.0.3440.84 Firefox 61.0.1-1 plasma-browser-integration 5.13.4-1
In Firefox, can you please check about:debugging and compare it to the error message in https://bugs.kde.org/show_bug.cgi?id=397138 ?
(In reply to Christian Stadelmann from comment #1) > In Firefox, can you please check about:debugging and compare it to the error > message in https://bugs.kde.org/show_bug.cgi?id=397138 ? This is the error message I got in Firefox: stderr output from native app org.kde.plasma.browser_integration: QSocketNotifier: Can only be used with threads started with QThread From host: using qt5ct plugin
"using qt5ct plugin" - this is known to be incompaible with Plasma, please uninstall it.