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 4
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! 🙂