The feature makes the browser completely inoperable until the password is entered? As far as I know, Firefox doesn't have anything like that built in.

There are some add-ons which password protect Firefox in a limited sense. This thread has an example: can I protect a profile with a password? However, users may be able to bypass this protection in a couple different ways, so it's certainly not airtight.

You might need external software to have more control over Firefox. See for example:

• Block and unblock websites with parental controls on Firefox
• http://www1.k9webprotection.com/ (I'm aware of this one because we have had support requests related to sites changing and becoming blocked until new exceptions were added)

Hi mamaofnine,

I think there is no such built-in feature of Firefox but you can use an Extension.
Here are some options:

• ProCon Latte Add-on
• A third party parental control program is k9 web protection
• You can filter content based on categories that you choose with OpenDNS Service

Hope that helped you! Please report back!