Noojee Click for Asterisk is a free Firefox extension which turns phone numbers on EVERY web page into 'Click to Dial' links.
Noojee Click is designed for organizations running an Asterisk PBX. Noojee Click works by scanning pages looking for phone numbers as you surf the web. When Noojee Click finds a phone number, it adds a small 'Noojee Dial' icon just after the number. You can then click on the 'Noojee Dial' icon to dial the phone number.
Phone number recognition is controlled by a set of simple patterns which you set via the Noojee Click configuration panel. This allows you to localize the set of recognized phone numbers.
Noojee Click is great for sales staff using a Web based CRM or just anyone who makes lots of calls from numbers displayed in a web page.
If you like Noojee Click try Noojee Receptionist, the only Asterisk application designed specifically for receptionists. Includes support for multiple receptionists as well as basic Presencing.
Once installed Noojee Click for Asterisk adds the Noojee Click icon into the Firefox status bar. Left click on the Noojee Click icon in the Firefox status bar to access the Noojee Click menu. From the menu you can dial any number, dial a number contained in the clipboard, configure Noojee Click, enable/disable Noojee Click and force Noojee Click to refresh the set of Noojee Dial icons; which can be handy if you have a page which updates dynamically.
When you click the Noojee Dial icon to dial a phone number, the call progress is displayed in the Status bar next to the Noojee Click icon.
20 October 2008 Noojee Click for Asterisk 0.5.0 released
View the release notes here. Noojee Click for Asterisk 0.5.x support both Firefox 2.X and Firefox 3.0.X
Why is the version number 0.5.x and is it safe to use? We have choosen the version number 0.5.x because Noojee Click is not yet feature complete.
Our intention is to do a number of incremental releases until Noojee Click is complete. Each release will be production quality unless we note otherwise. We will release a roadmap of the intended feature set in the near future.
Features
Works with Firefox (sorry no IE support as yet).
Adds a 'Noojee Dial' icon after any phone number on a web page.
It's simple to add new phone number patterns to match on.
Add a pattern by selecting an example phone number using the context menu.
Dial a phone number by selecting the number and then clicking 'Dial' from the context menu.
Supports Auto Answer on SIP handsets
Supports International dialing.
Supports dial prefixes (e.g. dial '0' to get a line)
icon just after the number. You can then click on the 'Noojee Dial' icon to dial the phone number. 
icon into the Firefox status bar. Left click on the Noojee Click 