hi. I love firefox button but at the same time i want to keep menu bar also.Actually i can access menu bar while firefox button displayed by pressing alt+f key. After that menu bar will be disappear.
You're right: if you display the menu bar permanently, then Firefox does not display the orange Firefox button.
As you've discovered, you can always display the menu bar temporarily by pressing either the Alt key or the F10 key. (Those keys activate the menu bar in a lot of Windows applications.)
Why do you want both?