Here's a very taxing flexbox webpage I'm developing: http://ahpedigrees.com/gallery/index.php/dogs/dog/190210
At the bottom, the pedigree view is a div containing many nested flexboxes. The slider adjusts the number of generations. There is a recursive function on the server side which build the object and another which builds the html. On slide, there is an AJAX call to the server for a new view. The div is set hidden, the html updated, adjustments are made to the new html (class updates) and then the div is un-hidden. In Chrome and IE, the response is fine. In Firefox, anything past 6 generations will lock up firefox and 4 generations is very slow. I've tried adjust various options in the CSS for the flexbox div's, but without luck. Any light anyone can shine on this would be appreciated. _______________________________________________ dev-tech-layout mailing list dev-tech-layout@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-tech-layout