Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

“Firefox.app” is an application downloaded from the Internet. Are you sure you want to open it?

  • 1 reply
  • 10 have this problem
  • 80 views
  • Last reply by freakedout

more options

Since upgrading Firefox to version 34.0.5, I keep getting the message "'Firefox.app' is an application downloaded from the Internet. Are you sure you want to open it?" How do I prevent this? I'm on a Mac running OS X 10.9.5.

Since upgrading Firefox to version 34.0.5, I keep getting the message "'Firefox.app' is an application downloaded from the Internet. Are you sure you want to open it?" How do I prevent this? I'm on a Mac running OS X 10.9.5.

Chosen solution

This is because of Gatekeeper. The way around is open System Preferences and go to Security and Privacy. Click the lock, which will then prompt you to type in an administrator username and password. You will see "Allow apps downloaded from:" and you can either select the option to allow apps from anywhere or click a button that says that you can open Firefox anyway.

Read this answer in context 👍 3

All Replies (1)

more options

Chosen Solution

This is because of Gatekeeper. The way around is open System Preferences and go to Security and Privacy. Click the lock, which will then prompt you to type in an administrator username and password. You will see "Allow apps downloaded from:" and you can either select the option to allow apps from anywhere or click a button that says that you can open Firefox anyway.