One thing I do not like about Mozilla Firefox 4 is the orange button. There is this great little add-on called “App Button Clear 1.0″ which makes the orange Firefox button transparent. Here are the instructions for installing it.
Orange Button in Firefox
Click the orange Firefox button, and click “Add-ons.”
In the top right, in the search box, type “App Button Clear” and press ENTER.
Click on “Install.”
Your Firefox button should now be transparent! 🙂