Use S-Net Connect to call numbers in Firefox.
What is S-Net Connect?
S-Net Connect is a Firefox add-on that enables S-Net Connect Desktop users to call telephone numbers on web pages. This add-on allows users to simply click on any number formatted as a telephone number to initiate a call. S-Net Connect is a communication software that provides the ability to make phone calls.
This add-on gives S-Net Connect Desktop users the ability to click to dial any number that is in the format of a telephone number on any web-page.
S-Net Connect is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install S-Net Connect if you trust the publisher.
S-Net Connect has earned a fairly good reputation and likely can be trusted.