How to make Firefox elegant with rein on Mac OS X

My default browser is Camino on Mac OS X and I'm using my private build.
According to this blog entry the future of Camino is unclear, so I've had a taste of Firefox.

First impressions are important.
  ・ First, it seems to be heavily made up.
  ・ Second, it seems not to be Mac style.

I think that
  ・ simplicity is the essence of appearance desired for all good browsers and
  ・ simplicity leads to elegance.

A brief struggle told me a good solution that makes Firefox elegant with rein: das Monochrom theme for Firefox.
I will mention a way to do so later…

Here are some screenshots of Firefox.

How to customize Firefox 12

1. Download and install Naoto Kusumi's rein/5.1.7 theme.
2. Modify some files in /extensions/rein@notiz.jp/chrome/rein.jar as below.

1) Step1 - Unpack rein.jar and reduce files unnecessary for Mac

cd /extensions/rein@notiz.jp/chrome
jar xvf rein.jar
rm -r appver browser global mozapps

2) Step2 - Modify files as below:

/mac/browser/browser.css
/mac/browser/tabbrowser/tabbrowser.css
/mac/global/notification.css
/mac/global/progressmeter.css
/mac/global/scrollbars.css
/mac/browser/feeds/feedIcon16.png
/mac/browser/page-livemarks.png
/mac/browser/places/bookmarksToolbar.png
/mac/browser/Secure.png
/mac/browser/Security-broken.png
/mac/global/icons/bookmarklet.png

3) Step3 - Repack rein.jar

cd /extensions/rein@notiz.jp/chrome
jar cvfM rein.jar mac
rm -r mac

4) Step4 - Edit /rein@notiz.jp/chrome.manifest

3. Edit /chrome/userChrome.css
4. Search engine's favicon in the search bar is set forth in /searchplugins/*.xml.
Edit corresponding section of .xml files to replace its favicon by magnifying glass.
5. Download and install Status-4-Evar: add-ons for Firefox.
6. Download and install RSS Icon: add-ons for Firefox.