T-mobile's login page last month dropped Firefox support -- returned a cryptic complaint about "agent ID". There is actually something we can do to make T-mo r

T-mobile's login page last month dropped Firefox support -- returned a cryptic complaint about "agent ID". There is actually something we can do to make T-mo reconsider: Call up one of their agents and play the naive user reporting the problem. Then voice a complaint when told that "the site supports Chrome and Safari". These calls get logged as an expense, presumably charged to the earlier policy decision to drop FF.