Yesterday, I updated FF to 72.0.2 when notified (pop-up window), later logged out of FF, and powered down computer at night. This morning, upon turning on the computer, opening FF, and logging in to sonic.net webmail, I found the icons missing on the webmail interface. I contacted sonic, the tech tried emptying cache, restarting FF, etc., and opening the email in Safari, where the webmail program opened successfully, all icons intact. Sonic.net claimed the problem is with FF, so I'd like the problem resolved quickly as I'm not a big fan of Safari.