Situation: The school’s OPAC computer must lock to the web address http://192.168.0.xxx/opac/ so that students will not use it to visit other web sites.
Note: Please take note of the address of this page since you may have to restart Firefox.
1. Make sure that you have the latest Firefox version.
2. Get ProCon Latte. You will be prompted to restart Firefox at the end of the installation.
3. Once Firefox has restarted, go to Tools > ProCon.
4. In the General tab, check “Hide from Tools menu”, uncheck “Show in status bar”, check “Lock the add-ons list”, and check the “Lock about:config”. Change the shortcut for showing ProCon (default is Ctrl + Alt + P; change this to something else so that would be another level of security against intruders).
5. Set a password. (Click on Set Password… in the General tab.)
6. On the main filter, check “Block all traffic”. Optionally, check “Add reason of blockage to warning”, using “Custom warning message” as message. You can also type the OPAC address in the “Redirect blocked page” address.
7. Click on the Whitelist tab, check “Enable whitelist” and delete all entries except the target URL (in our case, http://192.168.0.xxx/opac/). (The whitelist list can be edited just like in a text editor.)
8. You may need to restart Firefox for changes to take effect.
