According to the Google Web Store, Chromebleed is an extension for Chrome that will check to see if the website you are using is affected by the Heartbleed bug. Below is the description from the developer.
Displays a warning if the site you are browsing is affected by the Heartbleed bug
Many HTTPS-secured sites on the internet use OpenSSL. Unfortunately, a major vulnerability in OpenSSL was disclosed – known as the Heartbleed bug – yesterday that put hundreds of thousands of servers at risk of compromise.
Whilst some servers have been patched already, many remain that have not been patched. Chromebleed uses a web service developed by Filippo Valsorda and checks the URL of the page you have just loaded. If it is affected by Heartbleed, then a Chrome notification will be displayed. It’s as simple as that!
Please note that, in some jurisdictions, site testing can only be carried out with the express permission of the site owner. Please check what the law says in your local area before proceeding to download this extension.
The extension can be download at https://chrome.google.com/webstore/detail/chromebleed/eeoekjnjgppnaegdjbcafdggilajhpic