That is what you will see if something is blocking access to addthis.com. Typically this is because you're using the Ghostery browser extension, but it could be caused by any one of many others. If you go through your extensions and disable them (in chrome you can do this via chrome://extensions/) one at a time, you can easily determine which one is causing the problem. Once you determine the extension, you can usually either whitelist *.garmin.com or disable a specific checker for a specific site.
I'm having the same problem. It works on Internet Explorer, but my default browser if Firefox and it doesn't work. I see the reply above but I'm not knowledgable about browsers to know how to follow this advice for Firefox! I found something about extensions in the settings but I only have 2. My antivirus software is probably the most likely culprit as the other extension is the garmin communicator. I take it by whitelist, you mean, allowing it to work through a programme disabling it? I can't see any option to do that. Can anyone help?
