Keep in mind that if you're used to viewing Facebook through the secure connection (https), you'll need to revert to the regular connection (http) in order to add Twitter to your Facebook page.
To be sure the site is secure, look for a small locked padlock icon (often located in the right corner of the browser window) or check for "https" instead of "http" in the URL.
When you visit a secure site, your browser should show an image of a locked padlock, and instead of the usual http, the site's address will start with https.
To determine if the site is secure, look for a little lock on the bottom of your browser window and look up at the web address to see if it reads HTTPS.
If you want to know whether your browser is on a secure website, the beginning of the web address will be https instead of http.
Look in the URL line and make sure the credit card enter page has an HTTPS and not just an HTTP to ensure your safety.
Look for a URL starting with https or a locked padlock icon on your browser before submitting financial details.
A good indication of a secure website is to look for "https" in the website's URL.
You can tell if they have a secure server if HTTPS appears in the checkout URL.
You can tell if a website's server is secure if it has HTTPS in the URL.