Comment 4 for bug 1822528

Plasma Browser integration now kind of works with:

firefox 106.0.5-1 2067 latest/stable/… mozilla✓
xdg-desktop-portal 1.14.4-1ubuntu2~22.04.1

but I had to manually set permission - following directions for KeePassXC integration.

Steps:

sudo apt-get install flatpak
flatpak permission-set webextensions org.kde.plasma.browser_integration snap.firefox yes
restart firefox