Other ports put a minimum cap of 50ms on frame duration for animated GIFs to prevent annoying ads from flashing too quickly. ImageSourceWx.cpp will gladly return a frame duration lower than that, though.
Created attachment 22827 [details] Make GIF frame duration be at least 51ms (like other ports) This just follows the other ports leads here.
Comment on attachment 22827 [details] Make GIF frame duration be at least 51ms (like other ports) r=me
Landed in r35883.