In your location bar, type about:config

1. In the filter bar type network.http.pipelining and then set the results to:

network.http.pipelining -> TRUE
network.http.pipelining.maxrequests -> 8
network.http.proxy.pipelining -> TRUE

2.Right click -> New -> Boolean , name: plugin.expose_full_path value: TRUE

3.Right click -> New -> Integer , name: nglayout.initialpaint.delay value: 0

4.Right click -> New -> Integer , name: content.notify.backoffcount value: 5

5.Right click -> New -> Integer , name: ui.submenuDelay value: 0

6.Find security.dialog_enable_delay using the upper filter bar and set the item to: 1000 ( DO NOT WRITE 0)

7.Finddom.popup_maximum and select value : 3 or 5

8.Right click -> New -> Integer , name: content.notify.interval value: 0

9.Right click -> New -> Boolean , name: config.trim_on_minimize value: TRUE