MC-73883Fireball cannot be summoned without fire
I am sorry if this is a duplicate 
It is impossible to disable the fire of a fireball (don't say the name causes WAI, could also be that the name is because it causes fire on impact).
/summon Fireball ~ ~ ~ {Fire:-1s,direction:[0d,0d,0d]}
and /entitydata @e[type=Fireball,r=5] {Fire:-1s} on a existing fireball doesn't work, even the entitydata command says successfully changed to "...,Fire:-1s"
And one question, was the bug that fireballs without any direction to move (only 0.0,0.0,0.0) flicker already reported, and if so could you please tell me the report number 
Created Issue:
Fireball cannot be summoned without fire
I am sorry if this is a duplicate
It is impossible to disable the fire of a fireball (don't say the name causes WAI, could also be that the name is because it causes fire on impact).
/summon Fireball ~ ~ ~ {Fire:-1s,direction:[]}
and /entitydata @e[type=Fireball,r=5] {Fire:-1s} on a existing fireball doesn't work, even the entitydata command says successfully changed to "...,Fire:-1s"And one question, was the bug that fireballs without any direction to move (only 0.0,0.0,0.0) flicker already reported, and if so could you please tell me the report number
I am sorry if this is a duplicate
It is impossible to disable the fire of a fireball (don't say the name causes WAI, could also be that the name is because it causes fire on impact).
/summon Fireball ~ ~ ~ {Fire:-1s,direction:[]}
and /entitydata @e[type=Fireball,r=5] {Fire:-1s} on a existing fireball doesn't work, even the entitydata command says successfully changed to "...,Fire:-1s"And one question, was the bug that fireballs without any direction to move (only 0.0,0.0,0.0) flicker already reported, and if so could you please tell me the report number
I am sorry if this is a duplicate
It is impossible to disable the fire of a fireball (don't say the name causes WAI, could also be that the name is because it causes fire on impact).
/summon Fireball ~ ~ ~ {Fire:-1s,direction:[0d,0d,0d]}
and /entitydata @e[type=Fireball,r=5] {Fire:-1s} on a existing fireball doesn't work, even the entitydata command says successfully changed to "...,Fire:-1s"And one question, was the bug that fireballs without any direction to move (only 0.0,0.0,0.0) flicker already reported, and if so could you please tell me the report number
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I think what you are trying to do might work if you make "-1s" "0s".
Could it be -1 causes it to fire damage forever instead of not or for a certain time?
Also you don't need the "s", since the amount of time the mob is set on fire for is determined in ticks.
I believe that the Fire tag is for entities that are on fire, not the actual fire blocks.
The only way I know how to do this is by setting the ExplosionPower tag to 0, but that puts limits on the uses of the fireball.
you mean the entity displayed right? that the entity always has a burning animation?
@Samuel Klumpers the -1 determines not on fire, 0 means stopping with burning
@Aaron Rhodes you didn't read well, it never says anything about fire blocks, only fireballs
I do not only mean how it gets displayed but also that it always resets this setting to about 20s (I guess)