By default, this app prepends a 1 to the phone number. If this doesn't work for you, go to manage extensions->click the three dots->options->under "Tel Link Format" delete the "+1" at the beginning of the text box.

when trying to install I get "Installation aborted because the add-on appears to be corrupt."

I would ask that the developer please take a look

Will not install - FF says "corrupt"

Does the job, I encounter mostly ZA formatted numbers, was cable to customize the link to tel:{0} which removed the US (+1) dialing code.

This extension works very well in Chrome -- but only halfway in Firefox v57.0.1(64-bit). In Firefox, it converts the phone numbers into what appears to be links, and when clicked my dialer comes up -- but the number is not sent to the dialer. No number appears, and it will not dial.

This review is intended more for the developer -- once the Firefox version is fixed, this extension will be a boon to many.

Looks good for 0.4.4 release.

Works fine with asterisk.