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I am not sure if I understand your query correctly. Do you mean to say that the Google recaptcha is not loading in Firefox and chrome browsers? I have checked a test form with Google recaptcha in both the browsers. I see that the widget is loading properly at my end.
Please check this once again and let us know if you are experiencing any issues. It would be helpful if you can provide us with a screenshot of the issue along with the form ID/URL we can take a look and provide you with necessary assistance.