Use back button to close tabs

Hello everybody, I use Firefox for some days now, but I'm a little annoyed with the back button / back gesture usage with tabs. On all browsers I already tried, pressing back button finally close the tab after going back to the first website opened. But with Firefox, it only go to home and let the website open without closing taba. So we have to often close manually opened tabs. Is there a way to change that please ? Sorry for my bad english, I hope it's clear.

Thanks in advance.