A shell script for making copies of Firefox. Each copy runs their own profile so that I can have 3 separate sets of cookies.

split_firefox.sh

rm -rf /Applications/Firefox\ H.app
rm -rf /Applications/Firefox\ K.app
rm -rf /Applications/Firefox\ P.app

cp -R /Applications/Firefox.app /Applications/Firefox\ H.app
cp -R /Applications/Firefox.app /Applications/Firefox\ K.app
cp -R /Applications/Firefox.app /Applications/Firefox\ P.app

# Copy icons
cp ~/Applications/Split\ Firefox/horse.icns /Applications/Firefox\ H.app/Contents/Resources/firefox.icns
cp ~/Applications/Split\ Firefox/kigurumi.icns /Applications/Firefox\ K.app/Contents/Resources/firefox.icns
cp ~/Applications/Split\ Firefox/personal.icns /Applications/Firefox\ P.app/Contents/Resources/firefox.icns

# Find replace
sed -i '' 's/\<string>Firefox\<\/string>/\<string>Firefox-Personal\<\/string>/g' /Applications/Firefox\ P.app/Contents/Info.plist
sed -i '' 's/\<string>Firefox\<\/string>/\<string>Firefox-Kigurumi\<\/string>/g' /Applications/Firefox\ K.app/Contents/Info.plist
sed -i '' 's/\<string>Firefox\<\/string>/\<string>Firefox-Horse\<\/string>/g' /Applications/Firefox\ H.app/Contents/Info.plist
sed -i '' 's/\<string>org.mozilla.firefox\<\/string>/\<string>org.mozilla.firefox-personal\<\/string>/g' /Applications/Firefox\ P.app/Contents/Info.plist
sed -i '' 's/\<string>org.mozilla.firefox\<\/string>/\<string>org.mozilla.firefox-kigurumi\<\/string>/g' /Applications/Firefox\ K.app/Contents/Info.plist
sed -i '' 's/\<string>org.mozilla.firefox\<\/string>/\<string>org.mozilla.firefox-horse\<\/string>/g' /Applications/Firefox\ H.app/Contents/Info.plist

# NOTE: May require that you set up your own personal cert. in XCode
codesign --deep --force --sign "MyLocalCodeSignCert" /Applications/Firefox\ H.app
codesign --deep --force --sign "MyLocalCodeSignCert" /Applications/Firefox\ K.app
codesign --deep --force --sign "MyLocalCodeSignCert" /Applications/Firefox\ P.app

Caveat: To update Firefox, you update the "base" application "Firefox.app" and then re-run this script to create the copies.

Usage

1. Create the folder ~/Applications/Split\ Firefox
2. Copy the script to ~/Applications/Split\ Firefox
3. Replace FIrefox H, Firefox K and Firefox P in the script with your names.
4. Set up your images within the folder ~/Applications/Split\ Firefox/ so that the copies will have your icons. Icons are just square pngs with the extension switched to .icns.
5. Give the script execution permission
6. Run it!

Note: It may require that you set up your own personal cert in XCode for the codesign to work properly.