How to convert chrome extension to firefox via chrome-tailor?

Question

JavaScript

If I enter chrome-tailor run, then:

Creating XPI
JPM undefined XPI created at /tmp/@chrome-tailor-jetpack-0.0.2.xpi (3892ms)
Created XPI at /tmp/@chrome-tailor-jetpack-0.0.2.xpi
JPM undefined Creating a new profile
JPM undefined No Firefox binary found at null
JPM undefined Specify a Firefox binary to use with the `-b` flag.
Unhandled rejection Error: spawn /usr/lib64/firefox ENOENT
    at exports._errnoException (util.js:870:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:178:32)
    at onErrorNT (internal/child_process.js:344:16)
    at nextTickCallbackWith2Args (node.js:442:9)
    at process._tickCallback (node.js:356:17)

And if I enter chrome-tailor xpi, then:

JPM undefined Adding: /tmp/chromeTailor_244730Ixf8jicXvHk/data/crx/js/codeForDraft.js
JPM undefined Adding: /tmp/chromeTailor_244730Ixf8jicXvHk/data/crx/js/codeOne.js
JPM undefined Adding: /tmp/chromeTailor_244730Ixf8jicXvHk/data/crx/js/popup.js
JPM undefined Adding: /tmp/chromeTailor_244730Ixf8jicXvHk/data/crx/_locales/en/messages.json
JPM undefined Adding: /tmp/chromeTailor_244730Ixf8jicXvHk/data/crx/_locales/ru/messages.json
JPM undefined XPI created at /home/moz/@chrome-tailor-jetpack-0.0.2.xpi (3594ms)
JPM undefined Removing fallbacks if they were necessary..
Created XPI at /home/moz/@chrome-tailor-jetpack-0.0.2.xpi
Created xpi at /home/moz/@chrome-tailor-jetpack-0.0.2.xpi
Done!

I was so happy, I thought he converted my extension, but it turns out he just created a standard xpi example, and did not convert my extension. Maybe there is some other sequence of commands. Why does he create some kind of example for me?