This gesture extension works the best for me. Others sometimes confuse down-up with just down, which for me is the annoying difference between close and reload tab.

Wow i am enjoying and recommend this add-on for everyone. Because it is a timesaver like you cannot imagine!

Одно из лучших приложений FF
Использую постоянно

最高ね

Best add-on ever. The very first I install. Kudos.
One small, but significant future request:
Could you add a command to list history of the present tab?
Pretty much as '[Popup] Recently closed tabs' do it.

I noticed that when using the right mouse button as the activation button, the right click context menu would immediately pop up, which is annoying if you just wanted to perform a gesture. To fix this, go to about:config and toggle option "ui.context_menus.after_mouseup" to true.