Fceux Git (2018/12/20) is compiled. FCEUX is a cross platform, NTSC and PAL Famicom/NES emulator that is an evolution of the original FCE Ultra emulator. Over time FCE Ultra had separated into many separate branches. The concept behind FCEUX is to merge elements from FCE Ultra, FCEU rerecording, FCEUXD, FCEUXDSP, and FCEU-mm into a single branch of FCEU. As the X implies, it is an all-encompassing FCEU emulator that gives the best of all worlds for the general player, the ROM-hacking community, and the Tool-Assisted Speedrun Community.

Fceux Git changelog:
* ignore lmouse and rmouse lua input when main window isnt focused. it seems unlikely anyone would want these for any other purpose (xmouse and ymouse are based on the emulated window so the clicks should be too)

Source: Fceux Git (2018/12/20)
Source: Here