The ability to rearrange items in the add-on bar is built in. Just right-click and choose Customize.

For more info, see https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars

Yes, I am aware of using Customize, yet it does not work on some of the add-on icons. I cannot move some via dragging, yet others I can. When I try to drag the icon to the spot where I want it, the area that I want it to be has diagonal lines and will not allow me to put the icon in that area that has the diagonal lines. See attached pic.

Basically with the older Statusbar icons on the Addon Bar you can't re-arranged those icons or separate them away from each other, the best you can do is move the real Addon bar buttons to each side of that section of the Addon Bar.

I have never seen the statusbar area appear as wide as in your screenshot, you seem to have many addons that haven't been updated for the new Addon bar. The icons in the diagonal lines section of the Addon bar are in the old statusbar section of the Addon bar, that section can't be re-arranged. You could try using the old Organize Status Bar extension by "bumping" the MaxVersion, but I am not sure if that old extension would work any more even with the "bump". I haven't used the OSB extension since like Firefox 4 or 5 when I got rid of the last few extensions which used the old Statusbar code.

Quite honestly I am surprised that Mozilla hasn't gotten rid of that "legacy" statusbar code by now, ten new version releases and it's still there.

Agree with you that I am surprised that they are still not updating this. I placed a suggestion email to them just now...doubt it will do any good.

As far as changing the "Max" version, I cannot seem to remember how to do it?

The add-on bar seems wide because one of the add-ons is WorldIP and that takes up a wide area with the info I want it to show. There is actually only 6 add-ons in the bar total and they all are compatible according to the add-ons site for 14.01

I'm trying to move the add-on with the Up/Down Page icon to the far right. It will not allow me to do so or for that matter any of the others too. :(

About the only "updating" I would expect Mozilla to do is to finally get rid of that legacy statusbar area, which would force addon developers to start using addon bar coding instead.. And if that would happen, the extensions that currently use it stand a 50/50 chance of disappearing altogether, based upon what I have seen happen before.

You could save that extension to disk, and open it to bump the maxVersion yourself if you feel adventurous.

If you don't already have it, download and install the 7-Zip program - it is a file archive utility manager program for Windows - free & open source.
http://www.7-zip.org/
Once 7-Zip is installed, right-click the XPI file and select Open with > 7-Zip File Manager

Once you see the contents of that XPI, locate the install.rdf file.
Right-click the install.rdf file and select Edit & your text editor will open. Locate the em:maxVersion ine and edit to read 14.0.* . Then use File > Save as... in your text editor and 7-Zip will ask you if you want to save the changes to the archive - don't use any compression if you are asked about that.

To install an extension which you have on local disk, you can use File > Open File... or simply drag the XPI into the Firefox browser window.

You will need to test that extension to make sure it actually still works in Firefox 14. I'd be surprised if it did.