im using raspberry manjaro arm64, and i got the extension funcionalities without instaling it... was it intentional?

It's just fantastic, works even better when you have KDE Connect installed

Causes memory leak that causes both plasma-shell and firefox to gradually use more and more memory. Uninstalling Plasma Integration in the browser fixed this. Within 3 days of use, both Firefox and plasma-shell take up 5~GiB of memory.