A while back I ran across a toolbar for Mozilla Firefox that helps you look up the availability of domain names. It’s a very handy tool, however it was taking too much space on my browser, so I tried uninstalling to no avail. Months went by and I still couldn’t figure it out until today.

Here’s how you do it.

Go to C:\program files\Mozilla Firefox\chrome and find xpinstall.manifest

This is where the toolbar is loaded in. If you want to remove the toolbar, remove these lines:

overlay chrome://navigator/content/navigator.xul chrome://whoisbar/content/whoisbar.xul
overlay chrome://browser/content/browser.xul chrome://whoisbar/content/whoisbar.xul
content whoisbar jar:file:///C:/Documents%20and%20Settings/your.name/Application%20Data
/Mozilla/Firefox/Profiles/av318bvz.name/Chrome/whoisbar.jar!/content/

Follow the path on this last line to delete the .jar file. I hope this helps. I couldn’t for the life of me figure this one out for a while. The name.net bar can be uninstalled in the same way

An alternative domain name lookup is Whois.ws Quick Search by David McBreen. You can find it here.