I have a few pages that list IP addresses for systems that are accessible from a webpage. I don’t have access to change the pages so that the IPs are linked properly so I started looking around for something that would do it for me.
I couldn’t find a Firefox plugin that worked to do this, but I had previously found a GreaseMonkey script that highlighted phone numbers in pages. It would then let you click on them and it would dial your Asterisk Extension.
You need Greasemonkey and a blind eye to the fact that I reused a large part of the code, but it works for me.