[zamadatix]

This usually works out well for the sites just never bothered to test for Firefox and threw up the banner but it can end up going pretty poorly/silently-and-annoyingly-start-failing-halfway-through for sites that threw up the banner because they knew they didn't do feature detection and assumed Chrome or Chrome's behavior. I.e. "better than nothing if you are dead set on never installing Chrome" but, outside that, worse off than just going to your copy of Chrome for all but your most regularly visited websites that throw the "only supported in" banner.