https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode

Safe Mode is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes). If the problem goes away, that tells us one thing. If it does not, that tells us something else.

What theme are you using? Try using the default.

You can check the Web Console for possible messages.

• "3-bar" menu button or Tools -> Web Developer
• https://developer.mozilla.org/en-US/Tools/Web_Console

I am using the "default" theme. I switched to few other ones just to see. Nothing Changed. Also, when I click through the web console for messages, there are a whole bunch in red and yellow. I wouldn't begin to understand what those mean but I'm assuming somewhere in there, it is telling me what the problem is. At the end of the day, I can flip over to Chrome or Edge when I need that webpage - just thought I would see if folks who are smarter than me could quickly help me figure it out. Thanks...

I called for more help.

. . . when I click through the web console for messages, there are a whole bunch in red and yellow.

In order to better assist you with your issue please provide us with a screenshot. If you need help to create a screenshot, please see How do I create a screenshot of my problem?

Once you've done this, attach the saved screenshot file to your forum post by clicking the Browse... button below the Post your reply box. This will help us to visualize the problem.

Thank you!

I have a similar problem. Many maps do not display. Attached is a screenshot of an attempt to show a radar map on WeatherUnderground. The basic local radar map shows the precip without the underlying location map. Safe mode made the problem go away. The only extensions running are ones that I have been using for years.

Update: On experimenting I found that removing the DuckDuckGo Privacy Essentials extension allowed the maps to appear. Not sure how I might have installed it -- have no recollection. Removed the extension.

It could be the work of one of your add-ons, or it could be Hardware Acceleration. How to disable Hardware Acceleration {web link}

Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; <Control> (Mac=<Command>) <Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All Of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again. Let us know who the suspect is, detective.

FredMcD - When I encountered this issue, the first thing I did was went to safe mode. When the page worked in safe mode, I went back into regular mode and disabled all of my add-on's and plug-in's (of which I have very few). I also turned off hardware acceleration. The page still didn't load properly. That's when I posted my original question. I've posted a screen shot down below. The image on the left is with Firefox. The image on the right is with Edge.

Boot the computer in Windows Safe Mode with network support to see if that has effect.

• https://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
• https://www.7tutorials.com/4-ways-boot-safe-mode-windows-10

You can check the Web Console (Tools -> Web Developer) for messages about blocked content and about the presence of mixed or unsafe content.

• https://developer.mozilla.org/en-US/Tools/Web_Console

You can check the Network Monitor to see if content is blocked or otherwise fails to load.

• https://developer.mozilla.org/en-US/Tools/Network_Monitor

If necessary use "Ctrl+F5" or "Ctrl+Shift+R" (Mac: Command+Shift+R) to reload the page and bypass the cache to generate a fresh log.

I booted Windows 10 into safe mode. While in windows safe mode, the webpage loaded correctly in Firefox. Most of those other suggestions are above my pay grade....

Thanks for trying to help though....

FIGURED IT OUT!!!

Turns out that my anti-virus software sometimes doesn't play well with some aspects of Firefox. Deep down there was a setting in the ant-virus software that I could adjust for some Firefox things. Once I adjusted that, the page works as expected.

Thank you for helping me....

That was very good work. Well Done.

I also had a problem on my Mac with Weather Channel and Weather Underground's Wundermap not loading on Firefox.

I launched Firefox in Safe Mode and the maps loaded with no problem. It turns out that the culprit preventing loading in my Firefox browser was the DuckDuckGo Privacy Essentials extension. Since disabling it, the maps are back for the first time in at least a year. I had searched for the answer to my issues for that entire period with no luck. Now I don't have to open another browser for a decent weather map.

I hope this will help some of my fellow Firefoxers.

Well done.

DuckDuckGo Privacy Essentials will block maps on Weather.com. When I "unprotect" weather.com in the drop-down menu, maps show up. On my Mac I do not have an anti-virus, and Firefox's settings for popup windows changed nothing, but Unprotecting weather.com worked for me.