hello mashley, i'm not aware of any "strict" setting in firefox that would prohibit searches of that nature - maybe google offers a safe search mode but you can likely circumvent that by clearing / altering cookies that store this information.

i have no knowledge of iron port and how its filtering techniques hook into network traffic, but you'd likely have to contact their support in order to find out why it's not working as intended in your configuration.

Thanks, we are waiting for that response.