SUMMARY *** Firefox Plasma Integration extension doesn't work. Says "Failed to connect to the Native Host". Strange thing: it work in the live iso. STEPS TO REPRODUCE 1. Boot from the live iso, install Browser Integration to Firefox 2. Open Youtube or whatever 3. It works 4. Install the operating system, even from the same iso 5. Install Browser Integration 6. Open Youtube or whatever 7. It doesn't work I tried on my own PC and on a virtual machine within Windows. Same result. The extension only works in the live iso, no longer works after install. OBSERVED RESULT Should work. EXPECTED RESULT Does not work. SOFTWARE/OS VERSIONS Kde Neon downloaded from neon.kde.org: https://files.kde.org/neon/images/user/20230209-0714/neon-user-20230209-0714.iso ADDITIONAL INFORMATION I don't know anything about Linux so I don't know how to troubleshoot this.
For me the Firefox plasma integration started working again after some recent upgrades to neon user 5.27. Please let us know if it's still an issue for you.
I can confirm it works again after the latest set of updates for Neon.