You get the orange Firefox menu button when the menu bar is hidden.

• Firefox menu button > Options
• View > Toolbars (press F10 to display the menu bar)
• Right-click empty toolbar area

See:

• https://support.mozilla.org/kb/how-do-i-get-firefox-button
• https://support.mozilla.org/kb/Menu+bar+is+missing

If you are looking for a bit more sizzle, you can install a theme to change the appearance of the browser. These can change the background (lightweight theme), or everything from the colors to the button designs (complete theme). You can begin your quest here:

https://addons.mozilla.org/firefox/themes/

I meant that i want a new look for firefox and if the developers can do it . and also for the themes ,the themes dosen't make a difference in firefox they only change the colors of firefox .How do I contact the developers of firefox?

I started reading today about the changes expected to arrive in Firefox 25. Is that what you were referring to? Lots of news here:

https://www.google.com/search?q=firefox+australis&tbs=qdr:w

Hope that firefox wouldn't discontinue working on that