If those extensions are working properly and cause problems then you need to uninstall them. You can also check the Options of them in Tools > Add-ons > Extensions

See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

I could not get Bing maps to load in Firefox with those extensions disabled.

In IE8 Internet Options, I had to reset Security settings to allow "Scripting > Active Scripting" and "Scripting > Scripting of Java applets", then I got a screen saying that I had to install Silverlight to see the "new Bing maps": http://www.bing.com/maps/?showupgrade=1 but I selected "No Thanks", then Bing Maps loaded. Also then loaded in IE Tab Plus in Firefox. A PITA if you ask me, just another MS "requirement"?

I use maps.google.com instead.