Ok I will take a guess at this one.
Clear Browser Cache if that don't fix it then clear cookies remember that the cookies are your log in info user name/passwords. So if you don't have your browser set to remember this info make sure and write it down.
If that doesn't fix it then remove the IQS and re-install it.
There are several ways to test your browser by turning off all extensions/plug-in's or by safe mode
4. Safe Mode
This step is suitable for localizing any issue you’re having with Firefox. It tells you whether the problem is in your personal customization (extensions, settings, plugins) or whether it’s a general issue with the browser, independent of your personal user profile (corrupted installation, compatibility issue with other software etc.).
So without sitting down in front of your Rig myself and playing with it you will have to do some reading/searching and test things to find the problem.
you can make a new user under you browser and start over or remove and start over I don't know enough to give you a fix you may have a virus or malware or something.
I and the others that try to help will need more info to help you further.