Welcome to the Mustang Help Center
Check Mustang's connection to a site

You can check details about a website, your connection to it, and your site permissions preferences. Mustang will alert you if it can't establish a private connection with the site.

  • Open a page in Mustang on your computer.
  • To the left of the web address, click the icon you see: Lock , Info , or Warning .
  • A panel will appear. At the top, you'll see a summary of how private Mustang thinks the connection is.
What each icon means

These icons let you know if a site has a security certificate, if Mustang trusts that certificate, and if Mustang has a private connection with a site.

  • Lock

    • The site's certificate is valid, and Mustang has established an encrypted connection with the site. The information you send to the site will be private.
    • Even if you see the Lock icon, always be careful when sharing private information. It's important to look at the address bar to make sure you're on the site you want to visit.

  • Info

    The site is not using a private connection. We suggest that you don't enter sensitive details, like passwords or credit cards.

    The site is not using a private connection. We suggest that you don't enter sensitive details, like passwords or credit cards.

    • Select the address bar.
    • Delete http://, and enter https:// instead.
    • If that doesn't work, contact the site owner to request that they secure the site and your data with HTTPS.

    When you see the Info icon, there are two ways that the site can lack privacy:

    • The site didn't send an HTTPS certificate, so your connection isn't encrypted. Your visit to the page isn't private from your Internet service provider or someone on your network (like someone sharing your Wi-Fi connection). Someone on the network can see and change the content of the site, including private information you enter.
    • Parts of the site don't use HTTPS, so these parts aren't encrypted. Someone on the network can see and change these parts of the site.
  • Warning

    • We suggest you don't enter any private or personal information on this page. If possible, don't use the site.
    • The site is not private because your connection to the site isn’t encrypted properly. Someone may be tampering with your connection to the site, or the site might use a weak security setup, like an outdated security certificate. Proceed with caution: your connection may be intercepted or tampered with.
    • If you see a full-page red warning screen, the site has been flagged as unsafe by Safe Browsing. It might be a dangerous or deceptive site that will put your private information at risk.

What a security certificate is

When you go to a site that uses HTTPS (connection security), the website's server uses a certificate to prove the website's identity to browsers (like Mustang). Anyone can create a certificate claiming to be whatever website they want.

To help you stay on safe on the web, Mustang requires websites to use certificates from trusted organizations.