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If you visit a page in your Canvas course that is linked to insecure content, Chrome will display a shield icon  in the browser address bar.
You can choose to override the security restriction and display the content anyway by clicking the shield icon and then clicking the Load unsafe script button .
The following are known issues in Chrome and Firefox that may block or create mixed content within Canvas.
Google Chrome verifies that the website content you view is transmitted securely.
To optimize your web experience, we strongly recommend using the latest versions of your operating system, browser, and Adobe Flash Player. First, check for any available updates on your computer.
See instructions on turning on Windows updates here, or Mac updates here.
Some browsers may occasionally make modifications to privacy settings to protect users from possible insecure content.
This change does not affect Web Start applications, it only impacts applets.However, in Chrome and Firefox, you have the option to view insecure content.Please be aware of possible restrictions and view insecure content with caution.If you have problems accessing Java applications using Chrome, Oracle recommends using Internet Explorer (Windows) or Safari (Mac OS X) instead. If you continue to use an outdated version of the software, you may be vulnerable to serious security flaws that compromise your privacy and anonymity.