Are you using Firefox 3 or Firefox 3 beta as well as are you having problem with Google maps not showing up?
I think I might have the solution to this problem.
By the way, are you using Skype also?
If you are using Skype, then, this blog shall help you fix your problem with Google maps not downloading.
If you are not using Skype, then endeavour disabling some add-ons which manufacture utilize of Java Script, that might help.

Ok, lets start.
Open Firefox 3 as well as go to Tools | Add-ons.
Look on behalf of the Skype extension . It shall probably be version 2.2.0.86 or earlier! Right?
If it says version 2.2.0.89 or above, then its bad news, stop reading this blog as it shall be of no help.
If its says version 2.2.0.86 or earlier, endeavour disabling the extension … as well as Google Maps shall then work. I tried it, but it didn’t got disabled. If you manage to disable yours, do let me know. Anyway, I didn’t have much time to fiddle with it.

Now go to https://developer.skype.com/SkypeToolbars/
Scroll down till as well as download the “SkypeFFPlugin.2.2.0.89.exe” file of click here.
Install the file as well as restart Firefox.
That’s it!!!
Reopen Firefox 3 as well as Google Maps shall work.

If that doesn’t solve it, then, search the web on behalf of help or utilize Yahoo Maps!

Please do add a comment below to say whether this worked on behalf of you or not. Thanks!