Firefox and Chrome Majestic Add-on are different

I have done this several times and Chrome is showing me TF value for a specific pag while Firefox gives me a N/A...the root domain and subdomain urls using the same add-on can have a difference of 20 from Chrome to Firefox.

which is correct and working?

Dude . Good query...I have also faced this kind of issues. Some times the add-on showing with some errors in between the browsers. Confirm once again with the majestic website.