Rated 5 out of 5 stars

It is a nice job. I have already installed Any key. But I can't see its button displayed in the notification area/status bar and I can't go to its setting. I am interested in typing Amharic with the help of this add on.How can I do it?

There is no more status bar in recent versions of Firefox. You might use Right Click->AnyKey->Toggle in Text Editor to Type in your language or Press F2 while in the text box.