Stop button sɣur kiheru

3,9 n yitran ɣef 5

2 n yiceggiren

Yettwasezmel 1 ɣef 5
sɣur mr. sparkle, kaksi vuotta sitten
Doesn't work anymore. No stop button icon appears on the toolbar
Yettwasezmel 1 ɣef 5
sɣur Aseqdac Firefox 5818203, kaksi vuotta sitten
Dont work. Installed it but never a button, Not ricght, left, not in the menue, not in the options.

I cant understand why firefox delete this buttons.