In order to make the use of @eyoungren 's fantastic tweak guide a little bit easier for TenFourFox users, I have compiled all applicable settings into a prefs.js file that you can download and install. You no longer have to touch the about:config controls to take advantage of his awesome tweaks. NOTE: Ensure TenFourFox is not running during installation. To install, simply download the prefs.js file from the link below and copy it to: Code: ~/Library/Application Support/Firefox/Profiles/(Your Profile Name)/ Download (TenFourFox 38.5.0 Compatible) NOTE: This tweak file does not include all of eyoungren's tweaks. In his thread, there are many tweaks that may offer a performance advantage but are more up to user preference, for example offline caching is disabled in his thread. While that offers a performance advantage in some circumstance, I chose the most critical of his tweaks that make the biggest difference namely pipelining and other factors in this file. If you would like to learn more about what is changed using my installer, simply create a copy of the file and open it up using TextWrangler or a comparable program. Feel free to experiment with @eyoungren's other awesome tweaks, and keep on PowerPC'ing! DISCLAIMER: While I have not experienced any issues with the tweaks, I am not responsible for anything that could be caused by them. Keep in mind that you may need to change some settings back if you have created a custom about:config settings list already.