Render GIF animation with transparent background

I couldn't find any search results regarding how to export a GIF animation with a transparent background. I applied the "Comic Book" filter to my GIF which has a transparent background, and that filter does not appear to alter the image when rendered to an image sequence. However, when rendered to a GIF the file loses its transparent background. If this is not a bug and/or I'm doing something wrong, then I think this feature should be added.

I am not sure if I understand it, but if you are using a transparent GIF with a filter, then the filter must be also compatible with transparent background, and should be possible to remove the background to make it transparent

If the filter has a color control for the background you can easily remove the background by adjusting the alpha channel (THE A value to zero) and so you can keep the transparency on the output

You could show an example of what you have and you get that is wrong and show what settings you are using, so we can see if it can be modified to get what you want

I have not tested yet to modify a video file in FF so I am not sure if this is right

Hopefully, the example below clears things up. The is something that happens in other software too, in which a sequence of images that have transparency when rendered to a GIF will no longer have transparency.