Simple,
Firefox is a browser, like Internet explorer.........
here are the steps to sort this.
Step 1: Go to the Mozilla website HERE and download firefox..... follow the instructions to install it.
Step 2: Click HERE and click "add to firefox"
Step 3: Close down firefox and restart it again.
Step 4: Click HERE and select "install"
Job Done.
Now use firefox instead of Internet explorer and google maps run in it, maps are back as they were.
Thats about as simple as I can make it.
Geo-Jon