UrlbarExt For Mac Publisher's description
from H7SE A
A Firefox add-on that customizes your URL bar with 4 new icons.
Extends the Location Bar with set of commands to (Make Tiny URL,Copy URL,Search site,Go up,Tag pages easily ,Navigate through sequential URL's,View page cached version,Unblock filtered websites and Surf anonymously using online phproxy servers)
What's New in This Release:В· Updated to 4.0b8pre
System Requirements:В· Firefox 3.0 to 4.0b8pre
Program Release Status: Minor Update
Program Install Support: Install and Uninstall