DEMO: http://maxest.gct-game.net/content/fmaa_webgl/

FMAA, Fast Mixed Anti-aliasing is a collection of a few antialiasing algorithms:
- Temporal Antialiasing (TAA) - takes 66% of the time of Unity's built-in TAA. Always combines two frames: current frame and one previous frame.
- Edge Antialiasing (EAA) - very simple algorithm that blurs edges.
- FXAA - well-known NVIDIA Timothy Lottes's algorithm. Included just as a valuable addition so that it doesn't have to be downloaded separately.

TAA algorithm thanks to jittering camera position is capable of alleviating sub-pixel aliasing.
EAA and FXAA are post-processors that simply blur hard edges.
The two categories, temporal and post-processors, are orthogonal to each other and complement each other nicely. It is best to use a combination of either TAA+EAA or TAA+FXAA. The former will be faster while the latter will result in top-notch antialiasing solution that should be efficient enough not to take more than 1 ms on PS4 in full HD.

FMAA is currently not supported on VR.