I just updated a copy of Wordpress and it put a notice on the dashboard --
It looks like you're using an old version of Firefox. For the best WordPress experience, please update your browser.
Update Firefox or learn how to browse happy
"Update Firefox" and "browse happy" were both links... I picked "browse happy"
It took me to a site [browsehappy.com
...] whish is a page with links to Chrome, Firefox, Safari, Opera and MS-IE, (in that order)...
I mentally chose "F). none of the above"
, and went back to work on the Wordpress site.
I guess it's not that important if I'm as happy as WordPress thinks I should be...