I had Firefox 28. I read the article and clicked on Help> About Firefox. Check for updates.
It downloaded version 30 and moved my icons that I had along the bottom the browser window to the top menu. It made all my buttons small with no text underneath. I had Big icons and text prior to the update.
I also now see a RED menu and I have the tabs above the web address field. Totally messed things up. BTW it looks like Google Chrome. If I want Chrome I would use it.
No wonder Firefox is losing share.
I installed:
“Classic Theme Restorer (Customize Australis) 1.2.2”
It has reset back most of what I had.
https://addons.mozilla.org/en-US/firefox/addon/classicthemerestorer/
I still have that red. It is now blended with grey.
It turns out it is your title bar color under Personalize in Windows 7 (control panel). Change that color and it changes in Firefox.
Why would Firefox even pick up that color?!!