Sorry, the image didn't get uploaded. Here it is.

Make sure you are not blocking content.

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

Hi Fred,

That seems to have done the trick. I started FF in Safe Mode and the problem went away. I restarted FF in normal mode and it's fine now.

I'd like to understand why the problem arose in the first place. The page in question was re-developed a few weeks ago and in testing there weren't any problems with the map. So, I've done something in the meantime but have no idea what it might be.

Further to my earlier reply, the problem seems to be https. Since the page was redone a few weeks ago, the site has had SSL added to it. If the URL is preceded by https, then the map doesn't display but does display when the prefix is not there.

I have now got this sorted. Calling Google maps requires the following script:

<script src="http://maps.google.com/maps/api/js?sensor=false"></script>

This worked fine until the site became protected by SSL which requires all links on the page to be https. Changing the line calling Google maps to

<script src="https://maps.google.com/maps/api/js?sensor=false"></script>

fixes the problem.

Thanks again to Fred for turning the light on in my brain.

That was very good work. Well done. Please flag your last post as Solved Problem so others will know.