Firefox 4 uses a combined Stop/Reload/Go button that is positioned at the right end of the location bar.
During the page load process it shows as a Stop button and after the loading has finished the button is changed to a Reload button.
If you type in the location bar then that button becomes a Go button.
Middle-click the Reload button to duplicate the current tab to a new tab.

• http://kb.mozillazine.org/Toolbar_customization

This answer did not solve my problem as I initially wrote. Your answer states that Firefox 4 uses a combined/Stop?Reload/Go button that is positioned at the right end of the location bar but I do not have this button so how do I get my refresh button back??????

There is no button at the right end of the address bar that looks like a reload button? You could try opening the Customize window and choosing "Restore default set" and see if it reappears. If so, you can drag it to where it used to be, next to the Forward button.

See the image below.

If you want the buttons separated from the URL/Location bar, go to Customize (click Firefox button > Options > Toolbar Layout) and the buttons will show separated from the URL/Location bar as shown in the image. While the Customize window is open:

• To keep as separate buttons, you must drag them to reverse the order that is shown in the image below (Stop then Reload) or separate them by having another button or a space from the Customize window between them.
• You can drag the buttons to any other position on the Navigation Toolbar if you wish.

You need to update the following. The Plugin version(s) shown below was/were submitted with your question and is/are out of date. You should update to avoid known security issues with the version(s) you have installed. Click on "More system info..." to the right of your question to see what was included with your question.

• Adobe PDF Plug-In For Firefox and Netscape
• Shockwave Flash 10.0 r32
• Next Generation Java Plug-in 1.6.0_24 for Mozilla browsers
• Version 1.0.3, copyright 1996-2009 The VideoLAN Team http://www.videolan.org/ (current version is 1.1.10; visit the link to download and install the current version of VLC player)

1. Check your plugin versions on either of the following links':
   • http://www.mozilla.com/en-US/plugincheck/
   • https://www-trunk.stage.mozilla.com/en-US/plugincheck/
   • Note: plugin check page does not have information on all plugin versions
   • There are plugin specific testing links available from this page:
     • http://kb.mozillazine.org/Testing_plugins
2. Update Adobe Reader (PDF plugin):
   • From within your existing Adobe Reader (if you have it already installed):
     • Open the Adobe Reader program from your Programs list
     • Click Help > Check for Updates
     • Follow the prompts for updating
     • If this method works for you, skip the "Download complete installer" section below and proceed to "After the installation" below
   • Download complete installer (if you do NOT have Adobe Reader installed):
     • SAVE the installer to your hard drive (save to your Desktop so that you can find it after the download). Exit/Close Firefox. Run the installer you just downloaded.
     • Use either of the links below:
       • https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox (click on "Installing and updating Adobe Reader")
       • Also see Download link': http://get.adobe.com/reader/otherversions/
   • After the installation, start Firefox and check your version again.
3. Update the Flash plugin to the latest version.
   • Download and SAVE to your Desktop so you can find the installer later
   • If you do not have the current version, click on the "Player Download Center" link on the "Download and information" or "Download Manual installers" below
   • After download is complete, exit Firefox
   • Click on the installer you just downloaded and install
     • Windows 7 and Vista: may need to right-click the installer and choose "Run as Administrator"
   • Start Firefox and check your version again or test the installation by going back to the download link below
   • Download and information: http://www.adobe.com/software/flash/about/
     • Use Firefox to go to the above site to update the Firefox plugin (will also install plugin for most other browsers; except IE)
     • Use IE to go to the above site to update the IE ActiveX
   • Download Manual installers.
     • http://kb2.adobe.com/cps/191/tn_19166.html#main_ManualInstaller
     • Note separate links for:
       • Plugin for Firefox and most other browsers
       • ActiveX for IE
4. Update the Java plugin to the latest version.
   • Download site: http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE)
     • Be sure to un-check the Yahoo Toolbar option during the install if you do not want it installed.
   • Also see "Manual Update" in this article to update from the Java Control Panel in Windows Control Panel: http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates
   • Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml
   • Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org/Firefox_:_FAQs_:_Install_Java#Multiple_Java_Console_extensions
   • Java Test: http://www.java.com/en/download/help/testvm.xml

Unfortunately my customize is gone as well. I decided to get rid of Firefox. It's more trouble than it's worth and I don't like all the tabs either. Very frustrating when I didn't even ask for the new Firefox. It's just uploaded and restarted overnight without my permission.

To open Customize in Firefox 4, do one of the following:

• click Firefox Button > Options > Toolbar Layout
• To use the Menu Bar, press the ALT key or the F10 key, the Menu Bar will appear, click View > Toolbars > Customize
• HOLD down the ALT key while pressing the keyboard letters VTC

What about Firefox 6? It seems to be even more obnoxious...clicking on the Firefox button does NOT give me Options. Clicking on Tools gives me Options, but clicking on that Options does not give me Toolbar Layout. Why is it that this new version is makes you jump through hoops just to get back the stuff that was readily available before?

With Windows Firefox, I believe that you can get the menu bar back by pressing the Alt key, pulling down the View menu, and checking "Menu bar".