I want to use clic to call Firefox plugin. It work on Chrome, but not Firefox

Whenever I try to make change, I receive this error: Error: request is null. I would have no problem manually edit a text file to change the pattern has I only need XXX XXX-XXXX witch is not used by default

I use Firefox ESR 52.9.0 32bits on windows 10 and Zulu 3.0.1.
it work well on chrome 70.0.3538.110, But we need to use Firefox ESR for many reason.

Anyone have an idea?

Sorry you need Firefox 57 or higher. There is an ESR of Firefox 60.

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