I think it's because Chrome is dropping NPAPI plugin support. http://blog.chromium.org/2014/11/the-final-countdown-for-npapi.html
I just installed "IE Tab" for Chrome and have my camera's IP set to auto-open in IE Tab.
https://chrome.google.com/webstore/detail/ie-tab/hehijbfgiekmjfkfjpbkbammjbdenadd