What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
It may really depend on the settings of your browser's block pop-up configuration.
Base on experienced, when I just leave my browser's configurations to its default, it does not block anything from JotForm.
Pop-up embed method is one of the available embed code in the Form Builder by default.
Hope this help. Let us know if you need further assistance.