I see others have asked this question, but Firefox responders suggest solutions which have nothing to do with the problem. The problem isn't with Wix or website designers who use this service. There is no slowness problem using Wix in the Chrome or Edge browsers. This means the problem is with the Firefox browser. I have never had this slowness problem with Wix before recently, within the last month or so. I ask you to consider that a recent Firefox update may be at fault. Please fix this problem. I much prefer to use Firefox as my browser, but if I have to switch to Chrome to use Wix, which plays a significant part in my work, I might as well change over to Chrome completely. That would be a shame, since I've been a Firefox user for many years.