On Fri, Jul 16, 2021 at 04:31:25PM +0100, Andy Pieters via arch-general wrote: > On Mon, 12 Jul 2021 at 21:57, René Neumann <lists@xxxxxxxxx> wrote: > > > Hi Andy, > > > > not a solution, but a hint to gather further infos: > > > > - use `xprop` to find infos about the window in question. Among other > > things, this gives you a PID > > > > > I figured it out. > > I Still don't know why it didn't show in any of the lists of > apps/extensions... > > but... there was a hidden menubar in the actual player that had a link to > uninstall youtube app. Must be a KDE-specific app. If you have the name of the app, you could either check it's man page to find more info about it, or look it up on the packages/AUR (supposing it belongs to a package, and not just a plugin) HTH, -Jonathan