Firefox and Thunderbird: Beyond Browsing and Email

Chapter 15. Creating Your Own Theme

IN THIS CHAPTER

• Preparing Your Theme

• Creating Themes

• Multibutton Images

• Background Images

• An Example: global.css

• Final Results

• Theme Writing Secrets for Power Users

Firefox uses themes to change the look and feel of its interface with the user. You can either download themes or create your own themes. Themes and skins are both terms for changing the look and feel of a program. An example of using skins is the Windows Media Player.

In this chapter you will create a theme. Not a complete, ready-for-the-public version (to do that we’d have to dedicate most of the book to themes), but a theme that performs some formatting changes.

Theme creation is only a bit harder than modifying userChrome.css, allowing you to make Firefox’s ...