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Just outline of what it takes.<br />
Start at ubuntu LTS<br />
Now - lets make it work on normal system (virtual system does pretty well)<br />
Install it in your desktop virtualisation<br />
Make firefox-session - the way gnome-session is done<br />
Make lightdm autologin to that firefox-session<br />
Probably you will want to partition USB and have vfat partition first and linux boot image last.<br />
Ubuntu &nbsp;have USB image builder, now make use of it.
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Just outline of what it takes.
Start at ubuntu LTS
Now - lets make it work on normal system (virtual system does pretty well)
Install it in your desktop virtualisation
Make firefox-session - the way gnome-session is done
Make lightdm autologin to that firefox-session
Probably you will want to partition USB and have vfat partition first and linux boot image last.
Ubuntu  have USB image builder, now make use of it.

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We are trying to create a test taking environment for our students that could be run on their own personal laptops. To ensure that the students are only using a web browser on our local network, we would like to get them to boot a live OS from a USB stick we distribute. <br />
<br />
I was hoping to use a linux distribution and have it boot to firefox like a Kiosk.<br />
<br />
There is one custom Firefox plugin required for the testing environment we use. <br />
<br />
Any suggestions on where to start?
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We are trying to create a test taking environment for our students that could be run on their own personal laptops. To ensure that the students are only using a web browser on our local network, we would like to get them to boot a live OS from a USB stick we distribute. 

I was hoping to use a linux distribution and have it boot to firefox like a Kiosk.

There is one custom Firefox plugin required for the testing environment we use. 

Any suggestions on where to start?

Live USB boot to Kiosk Mode

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

Web browsers are applications used primarily to display documents, files and media from the Internet, identified by a Uniform Resource Identifier (URI) that can be a page, image, video or other file. Some browsers require the use of add-ons or extensions to safely render the information they receive; others have systems built into them to perform the same functions.