Of course, the simplest way to meet WCAG’s requirements is to avoid flashing content. That may be a good idea from a general user experience perspective — flashing content can be distracting, particularly for people with attention disorders, and it’s usually not necessary for getting your point across.
However, there are defensible reasons to use flashing content. If that’s the case, keep the content small.
WCAG requires that “the combined area of flashes occurring concurrently occupies no more than a total of .006 steradians within any 10 degree visual field on the screen (25% of any 10 degree visual field on the screen) at typical viewing distance.”
For reference, on a 1024 x 768 screen, a 341 x 256 pixel block would represent a 10-degree viewport. These requirements are based on existing standards for television broadcasts
Animated gifs are used by far to many people and businesses for us to write them out of TDF and we do not have the funding nor manpower to write our own an extension.
That said it would appear that the previous post's link offers a solution.
However you do mention seizures. Epilectic seizures affect 1.2 % (over 4 million) North Americans. Based on 1000 visitors at any given moment it would result in up to 12 visitors affected so you are not alone.
What we could do is require that all animated gifs larger than a specific size be limited to a maximum number of image changes per minute. To avoid triggering seizures.
We will research and discuss this at a management level if the browser option does not work.
