Fun side effect of long-running AJAX apps: even though Google disabled the feature, it will still be live for everyone who has a gmail window since (at least) yesterday. The feature must have had a timed activation.
You have to refresh the page. And apparently even that may not be enough. I Ctrl-R refreshed in Firefox and still saw the button (aggressive caching?). I closed the tab and loaded gmail in a new tab, and finally button went away.
I still have the button too! Refreshed and it didn't go away. I assume I have to log out to actually remove it. I'm not sure how long this tab has been open for.
You have to refresh the page. And apparently even that may not be enough. I Ctrl-R refreshed in Firefox and still saw the button (aggressive caching?). I closed the tab and loaded gmail in a new tab, and finally button went away.