Browser Development • Re: Linux Pale Moon with Qt toolkit

Tell us more about how you have configured Qt4, Qt5 and Qt6 to use GTK2 themes? This could be a solution to one of Pale Moon's issues around GTK2.

Via qtconfig (for Qt4), qt5ct and qt6ct. You might also need to install some additional packages, such as qt5-qtstyleplugins or qt6gtk2, and have a properly exported variable in your environment (for Qt5 at least): export QT_QPA_PLATFORMTHEME=qt5ct

See the screenshots below, taken from my typical Linux install, with Sawfish as the window manager and Crux as the GTK2 and Sawfish theme, and the gorgeous, pixel-perfect Helvetica (xorg 75 dpi) as the UI font.

I have no idea if a Qt4 port would be feasible and/or useful to users, maybe others could chime in on this.

Qt4 is the past, Qt5 is the present, Qt6 is the foreseeable future. I'd recommend not bothering with Qt4 and going for Qt5 (or maybe Qt6, but it might be a couple years "too soon" for many distros).