Removing “Smart Web Search” crapware from Firefox

A relative recently had a problem with his computer, where any links he clicked from email messages in Outlook popped up the browser, but always to a “Smart Web Search” page.  When I initially heard of it, Google Chrome was getting the blame for the problem, but I was pretty sure it was just an issue with some crapware.  After he took it to someone in the Milwaukee area who charged $90 for claiming to fix it but did absolutely nothing towards taking care of the problem, I finally managed to get some time carved out to address it.  Thankfully I could remotely access the system via UltraVNC and see the problem, and it only took about five minutes to figure it out and get it corrected.  This link was the first I clicked when researching the problem, and disabling (and removing) the “Smart Web Search” crapware extension quickly got things back to normal.