On a certain website, starting only after I installed the latest update,when I attempt to type into a text box nearly the entire screen disappears and goes white. Before, the screen did not change and I could watch the words I was typing appear in the text box. Now, I can see nothing. I'm typing, and when I minimize the keyboard (Gboard, same as I've always used) the screen goes back to normal, but while I'm typing there's nothing but white. Occasionally/rarely, this does not happen and everything works as it did before I installed the update, but most of the time I get the white screen. I did not update anything else nor do anything with the settings. I literally posted a message on that site, updated Firefox, then went back to the site and suddenly had the white screen problem. I'm attaching two images. One is a screenshot of the discussion showing the text entry box and the other is a photo of what the screen looks like when I tap in the box to enter text. I cannot get an actual screenshot of the white screen because attempting to take one minimizes the keyboard and the problem only occurs when the keyboard is in use. I masked a lot of stuff on the images because it's a private and secure site. I'd be willing to share more information only with the Mozilla technical team.