The lastest version of Firefox has developed an intermittent bug on my desktop computer. Especialy after a full shutdown, the the program stops displaying a lot, but not all, of the webpage content on most webpages. Drop-down menus and sidebar buttons seem especially prone to the problem, but large chunks of main content also fails to display on most webpages. It's like the page has only partially loaded, but the loading process has actually stopped.

Uninstalling, rebooting and re-installing temporarily fixes the problem. but it keeps coming back.