Hide address bar or disable typing on it. How to do that or some addons?

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#1

I hope this is the right category, if not please move it

I have computers in college, that only to accessing the college site, i already disabled accessing another sites in C:\WINDOWS\system32\drivers\etc\hosts

i need to hide address bar or disable typing on it too
how to do that or some addons?

please help i really need this, there should be someway to do that

#2

help please, if wrong category please move it

#3

Please head on over to Mozilla Support for help with Mozilla products. This community is for contributors, not support. Thanks!

#4