Thebornage button "transmit my returns now" is not working for file an extension? using safari

[phillykeith]

the captcha keeps expiring and say check the box again

[fanfare]

You don’t need to file Form 4868 if you make a payment using the IRS
electronic payment options. 
You can pay all or part of your estimated income tax due and **indicate that the payment is for an extension** using Direct Pay, the Electronic Federal Tax Payment System, or using a credit or debit card. Your extension is then automatically granted and you will receive a confirmation number for your records.

[SusanY1]

Try clearing browser cache and cookies and then trying again.