Type about:preferences#content<enter> in the address bar. Across from fonts and colors, press the Advanced button. On the bottom, turn on Allow Web Sites To Choose Their Own.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/websites-look-wrong-or-appear-differently

Fred,

Thanks. I tried your suggestion, saved the change, and restarted firefox just to be sure. The change created an improvement, but (for example), the volume button for the NYT videos appears correctly, but when I hover or click on it, the volume "scale" doesn't appear, so I can't change it. Same with att mail, the buttons appear good, but clicking on them gets no response. What next?

pqatonyp said

Thanks. I tried your suggestion, saved the change, and restarted firefox just to be sure. The change created an improvement, but. . . . .

A journey of 1000 miles begins with the first step.

Update your Flash Player Version 18.0.0.203
https://www.adobe.com/products/flashplayer/distribution3.html Note: Windows users must download the “Internet Explorer” and “Plugin-based browsers” installers.

See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes