I have been accustomed to browsing the internets a certain way, and without the handy ‘return-to-previous-page’ button working, internet scouring has become less efficient; disinured. Even after many instinctive attempts to back out of a site, the results have been “oh yeah, that doesn’t work” or “this is the mouse’s job now”.
Here is how to rectify our little problem:
Type “about:config” in URL and press enter.
Filter for “browser.backspace_action”.

change the value to “0”

And there was much rejoicing.