Software

These are my private builds of the Win32 version of Firefox. These builds are not the official builds of Mozilla. Personally made by me. Use it at your own risk. The features are as follows:

• Applied CSIR PGO. Create a temporary IR PGO build, then collect the profile data again with that build, and apply them to the final build. This results in optimizations that are more aligned with the actual execution of the program compared to standard IR PGO (probably).
• No installer.
• Added my patches into a Source folder.

Compared scores from some benchmark tests across various Firefox-based browsers and more.

• The benchmark test was automatically executed using Selenium.
• Some browsers include extensions by default. I am looking for ways to disable these extensions as much as possible, but so far I have not found a solution. This may affect the benchmark test scores.
• PC used for benchmark testing: Windows 11 24H2, Ryzen 5 5600, GeForce GTX 750 Ti.

Speedometer 3.1 Scores

Last updated: April 26, 2025

Speedometer 3.1 Scores (n=30) (higher is better)

	Chrome 135.0.7049.115	Edge 135.0.3179.98	Tete009 137.0.2	Firefox 137.0.2	Zen 1.11.5b	Floorp 11.25.0	Waterfox 6.5.6	Mercury 129.0.2 AVX2
Score (median)	23.8	22.9	21.0	20.45	20.0	18.6	18.5	14.2

MotionMark 1.3.1 Scores

Last updated: February 2, 2025

MotionMark 1.3.1 Scores (higher is better)

	Edge 132.0.2957.127	Chrome 132.0.6834.160	Tete009 134.0.2	Firefox 134.0.2	Waterfox 6.5.3	Floorp 11.22.0	Zen 1.7.4b	LibreWolf 134.0.2-1
Score (median)	2580.27	2290.30	1593.41	1487.93	1358.85	1355.76	1291.47	813.14

Here is my usual way of updating my builds of Firefox:

1. Uncompress the self-extracting file of my build into an appropriate folder.
2. Open the folder in which an old version of my build has been installed and backup the following files and folders as needed.
   • searchplugins folder
   • plugins folder
   • tmemutil.ini file (if exists)
   • folder specified by the PortableDataPath (if portable mode is enabled)
3. Remove the old version of my build.
4. Restore the files and folders from backup into a new version as needed.
5. Change Firefox's locale setting to your locale if necessary.
6. Install a language pack if necessary.

"Firefox private build" is English version, but you can localize it in the following way:

1. First, install the XPI language pack. It will be possible to get the official packages from the following URL. Replace the part of (Firefox's version) with the string of Firefox's version (3.0.0, etc). It is necessary to match the version of Firefox and the version of the XPI language pack:
   • http://releases.mozilla.org/pub/mozilla.org/firefox/releases/(Firefox's version)/win32/xpi/
   • ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/(Firefox's version)/win32/xpi/
2. Next, change Firefox's locale setting to your locale. Here are three examples:
   • Open or create the user.js file contained in the profile folder and add the following line.
     user_pref("intl.locale.requested", "ja");
   • Enter about:config in the Firefox's location bar and change the value of intl.locale.requested from en-US to your locale string.
   • Change the command-line string of Firefox like the following:
     "～\firefox.exe" -UILocale ja

SkyKakapo is an independent web browser developed by Tete based on the Firefox open source project.

This software is provided "as is", without warranty of any kind. The developer shall not be liable for any damages arising from its use.

It is not affiliated with the Mozilla Foundation or Mozilla Corporation. Firefox is a trademark of the Mozilla Foundation.

• SkyKakapo aims to improve performance while maintaining compatibility with Firefox, including its UI and default settings, as much as possible.
• Applied CSIR PGO. Create a temporary IR PGO build, then collect the profile data again with that build, and apply them to the final build. This results in optimizations that are more aligned with the actual execution of the program compared to standard IR PGO (probably).
• Added a profile import feature to the File menu.
• Added a menu editing page (about:preferences#menus) to Settings. Allows hiding unwanted items from supported major menus.
• No installer.
• Added my patches into a Source folder.

Release DLLs for My Private Builds of Firefox.

At present, there is no beta DLL.

This is a test DLL to check if Release DLL or Beta DLL contain bugs. This DLL uses the original MS C run-time codes for most functions.

If the problem is eliminated by using the following DLL, that means there will be some bugs in an old DLL. In that case, I would appreciate it if you could provide me with the version number of DLL in which the problem exists.

The tmemutil.ini file is the initialization file for tete009 builds. If the tmemutil.ini file exists in the root folder of the tete009 builds, initialization settings are read from it.

Lines whose first character is ; (semicolon) are treated as comment lines. The contents of comment lines are not read as initialization settings.

This is a macro of the 32-bit Maruo editor (秀丸エディタ) to parse whether the current document is a XML document. This macro uses MSXML for parsing documents.

XML Parser for Maruo Editor version 1.11 (Zip archive, 22KB)

• MD5: ab8284ef9d45508d81200f0006211b42
• SHA1: a7f91302d1920e15c6206b02026945bb92f8984f

Requirements:

• Probably Windows 95 or later (Intel x86).
• MSXML. MSXML has been already installed on the modern Windows, but you can also get it at the following site.
  
  • http://msdn.microsoft.com/XML/XMLDownloads/default.aspx

This is a shell extension, which permits Explorer to display the thumbnail images of Nikon's NEF files. Use at your own risk!

NEF Thumbnail Extension version 1.00 for Windows 2000 (Zip archive, 45KB)

• MD5: 45EA546E12A8893B5833E1A1BE314AE9
• SHA1: 93203B37F79713E26D3218D4A4A709F59A32CD07

This DLL makes PicLens usable on Windows 2000. I confirmed this DLL worked well with Firefox.

PSAPI wrapper for PicLens on Windows 2000 version 1.00 (Zip archive, 1KB)

• MD5: AE88186A751493067CE73328E27BE405
• SHA1: 28BB93D26627CB5930F4A75860C383535D3CB69F

Usage:

1. Put PSAPI.dll in the folder that contains web browser's executable file (example: firefox.exe).
2. Install PicLens.
3. Run web browser.

If PicLens doesn't work, please disable it once and restart web browser. Run web browser again and enable PicLens.

This is a program icon changer (for Firefox or Thunderbird). I often hear the program icons of unofficial builds are not cool, so I made this changer. This changer may have a few bugs, so please create a backup copy of a target program before trying it.

Program Icon Changer (for Firefox? & Thunderbird?) version 0.04 (ZIParchive, 5KB)

• MD5: c2b5528039656cb67152264385269354
• SHA1: 25eb5b4748d517c814062afd3d4447b62efb7fdb

Requirements: Windows 2000 or later (Intel x86).