Removing white outline around a GIF

Hello everyone,

So i'm fairly new to using the motion and timeline part of photoshop but created a fairly simple GIF with transparrency and when i post it against a dark background it's left with a untidy white outline that i'm not sure how to remove/tidy up.

I have tried making the edges tidier but removing any blur but that seemed to make no difference.

As i said, i'm fairly new to this aspect of photoshop, so i may have missed something blindingly obvious.

Any clue on what i need to do?

Thank you in Advance!

The most effective means is to remove a white boundary is to open up the gif in Photoshop as well as take a look at each private photo in the gif. Seeing to it none have the white border; you then wait as a gif with openness. Constantly examine the "transparency" box if you don't want a history.