I just replaced my MacBook Pro with a newer one, running the same OS (10.15.5). I migrated everything onto the new laptop from my Time Machine back-up disc. Everything se… (read more)
I just replaced my MacBook Pro with a newer one, running the same OS (10.15.5). I migrated everything onto the new laptop from my Time Machine back-up disc. Everything seemed fine until I discovered that certain websites were not loading properly. Examples: Weather Underground starts to load but almost immediately goes to white screen. Bank and credit card sites display the Log In page properly, but once I log in the screen goes white. The site of one newspaper to which I subscribe opens with proper text and formatting, but no photos (white where photos should be), and the sites topmost menu bar functions do not respond, so I cannot even log in (other newspaper sites I subscribe to seem to be fine).
The problem sites loaded and operated fine when I tested them with Safari, but I am a longtime Firefox user and prefer it (especially since Safari apparently no longer supports Dashlane).
I tried changing my Firefox privacy & security setting to Standard. I have restarted Firefox and my laptop repeatedly while trying the few things within my ken. Any help would be appreciated.