three.js: r80dev and Firefox console errors

It seems everything works as expected so far, but with Firefox (the latest versions) I get this console error all the time:

THREE.WebGLProgram: gl.getProgramInfoLog() C:\fakepath(501,7): warning X3557: loop only executes for 1 iteration(s), forcing loop to unroll
C:\fakepath(510,7): warning X3557: loop only executes for 1 iteration(s), forcing loop to unroll

With r79 everything was fine.