Map services blocked by FireFox but Not IE

[ShaningYu]

I am working on a ArcGIS Flexviewer project.  The map services (including ESRI's basemaps) display well on IE but got blanked in Firefox.  What's the possible reason for it?  Thanks.

[RhettZufelt]

I have seen this issue when the data is accessible only to users on a domain.  IE passes your domain credentials to the web server, Firefox does not.

At least in the past it worked this way.  Our IT guys had us remove Firefox and only use IE for "security" reasons so I can't test it ?????

R_

[Drew]

I am working on a ArcGIS Flexviewer project.  The map services (including ESRI's basemaps) display well on IE but got blanked in Firefox.  What's the possible reason for it?  Thanks.

The best way to debug the problem would be to use FireBug or Fiddler to see what the tiles are coming back as.. 404 Errors, 403?

[ShaningYu · Accepted solution]

It was one of my old threads.  The problem got solved a long time ago.  It was a proxy issue.