There is one main issue I would like to point out: If I remap the keyboard keys in KDE System Settings > Global Shortcuts, I am unable to use the remapped keys in Firefox and some other programs. I am not sure if it is possible for the extension to make it possible for that to happen, though.

Works after copying the native messaging host (org.kde.plasma.browser_integration.json) to ~/.mozilla/native-messaging-hosts

This is simply a superb addition to one of the best desktop enviroments going

fucking amazing! media controls doesn't work on windows but works perfectly on manjaro! 5/5 would recommend

Must-have for KDE users using Firefox, it's great!

A tool that helps a lot butter never annoys :P

Indispensable!

This add-on is simply essential! Finally Firefox begins to properly integrate with Plasma Desktop.

Looking forward to new features.

Firefox broken after installation of this addon

Works flawlessly!

Extension indispensable pour Plasma by KDE qui fait son job sous GNU/Linux. Merci pour le boulot.