flop_leash_973 , 1 month ago

I worked somewhere like that back in the 2008-2010 time frame. Thankfully, there was a extension, I believe the name was “IETab”, that would spawn a new tab in Trident (IE’s browser engine). So you could set certain sites to launch in one of those tabs and everything else would use standard Firefox. None of the people I supported were any the wiser. They just thought everything worked in Firefox.

Granted it was only that seamless because Windows already had that rendering engine built in. There are some extensions that do something similar with Chrome, but because of more modern security standards and whatnot you have to install extension helper applications which is gross.