If you like Bluebird, you may also want a Chrome / Firefox theme to match. Below you'll find a theme that matches Chrome perfectly and a Firefox 4 theme which isn't a perfect match for Bluebird but looks great nevertheless. The Firefox 4 theme actually integrates quite well with other themes too.
Chrome / Chromium
For Chrome there's a theme that matches Blubird perfectly . However, to get the full experience, you may want to check the "Use system title bar and borders" option in Chrome settings ("Personal Stuff") tab.
Here's how it looks like:
DOWNLOAD Bluebird for Chrome
Firefox 4
Bluebird already looks great with Firefox 4 but you can use a theme called "QSQ" to get nicer buttons and a "more integrated" overall look - even though it doesn't matches the Bluebird colors perfectly.
Download QSQ for Firefox 4.
If you want to be able to move the Firefox 4 menu (button) to the right but have a blue icon like in QSQ and not orange, install the Movable Firefox Button extension, move the menu button then disable the Movable Firefox Button extension.
Thanks to elavdeveloper for QSQ and Gabor Halaszvari for Chrome Bluebird!