Stuff like medical record portals, financial websites for my companies retirement plan. Stuff I have little choice about. And most fail silently.
I recall how South Korea literally painted itself into a corner for becoming too dependent on Internet Explorer after years of using it with a security implementation based entirely on ActiveX.
I'm currently using a user-agent switcher plugin. Allows me to spoof servers into believing I'm running a different browser.
How it used to be old GSM phones like those from Nokia that were then the thing for the underworld.