yochananmarqos [1] filed a request to merge palemoon-gtk3 [2] into palemoon [3]: Upstream now uses GTK3. [1] https://aur.archlinux.org/account/yochananmarqos/ [2] https://aur.archlinux.org/pkgbase/palemoon-gtk3/ [3] https://aur.archlinux.org/pkgbase/palemoon/