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Feel free to donate me something as a sign of appreciation for the UOC Patch and the Enforcer. Click on the "Donate" button to donate with PayPal: *UPDATE!* All the versions of the UOC Patch, including the Enforcer, have been rewritten from scratch. This time, I have extensively reworked the tweaks used for the rendering engine, which allowed me to double the scrolling speed of the patched browsers, increasing the general responsiveness. Loading times have also been shortened, thanks to some tweaks backported from K-Meleon Goanna. The New Moon 28-specific version of the UOC Patch has been withdrawn, since now the Patch no longer comes with E10S enabled, due to compatibility issues on some machines with some video cards (especially ATI ones). Users of the SeaMonkey browser, especially version 2.48, can use the 45 ESR version of the Patch once again. I recommend you to start with a new and clean profile, in order to get the most out of your patched browser: old and "dirty" profiles might hamper the performance of this new version of the UOC Patch. The UOC Enforcer is now is required in order to fully enjoy the optimizations introduced by the new version. So, do not forget to install both the UOC Patch and the Enforcer! An explanation on how to install the UOC Enforcer is written below, right in this post. Build number is N2M. A brief introduction Hi everybody, I'm writing this thread because I would like to share with you an experiment I made as a result of two years of using an old, single core system (an overclocked Pentium III-S Tualatin 1.4GHz) with the modern web. As you all know, the most versatile and useful web browser to use for old machines, especially XP ones, is Mozilla Firefox, thanks to its customizability, the numerous forks that it spawned and the built in certificates manager that makes things easier if we want to connect old computers to the internet. This thread focuses specifically on @roytam1's browsers for XP, such as New Moon 27 SSE and Firefox 45 ESR SSE, because they are the ones I use on my Pentium III system and the ones I used as a base to develop my "patch". We know that old computers, especially if single core or SSE only systems, can struggle a bit with the stock versions of these browsers, because they are quite resource intensive, and so the experience is quite limited unless you have an hardware that is capable enough to run the browser comfortably. So, a year ago, back when my Tualatin was still a 800Mhz Coppermine system, I started delving into the about:config of Pale Moon first, and New Moon later, in order to reduce as much CPU and RAM consumption as possible. Had to do several trials and errors, but in the end, I finally managed to get improvements in responsiveness and overall speed on the browser and so, after six revisions, I officially want to release the UOC Patch, my personal attempt, inspired by the community and by my experience of using an old computer as a daily driver, at making web browsing with Firefox and derivatives a much more enjoyable experience. Ok ok, good. So what's the UOC Patch? The UOC Patch (shortened form of Ultra One Core Patch) is a custom Global Preferences file available for any Mozilla based browser that uses the codebase of Firefox 38 ESR (such as Pale Moon and Roytam1's New Moon) or Firefox 45 ESR (i.e. Firefox 45 ESR SSE always by Roytam1), that is aimed at optimizing the browser to run on old machines and to consume less resources. Bear in mind that I developed the UOC Patch for my machine, which used to be a 800Mhz Coppermine and now is an overclocked 1.4GHz Tualatin, so it might perform differently on yours, but it should bring some improvement in terms of speed. The UOC Patch is a Defaults Override file, meaning that it goes in the following directory "C:\Program Files\{Your Mozilla based browser}\Defaults\Pref\". As soon as you put the patch into the "Pref" folder, the default about:config parameters will be replaced by the ones of the patch, unless you have modified the same parameters. If so, you can switch to the UOC Patch parameters by simply resetting them in the about:config. The UOC Patch is not compatible with Firefox Quantum. The requirements? Surely it has them. Well, yeah. The UOC Patch requires at least a DirectX 9.0c capable graphics card. Even though it will work on a DirectX 8 card, I don't have one I can use to test it so it's pretty much untested. I tested the patch with a Geforce FX5500, an FX5600, a 6800GT and an ATI Radeon HD3850 and my current graphics card, an X1950 Pro, and the patch speeds up the browser as it should. Then, ideally, the CPU. A 800MHz CPU and higher can give you a better experience, again, I don't know how it does perform on a slower CPU. RAM wise, any system that can run New Moon 27 and derivatives or Firefox 45 ESR SSE will support the UOC Patch without issues. So, to recap, you need: A DirectX 9.0c capable graphics card with at least a 128 bit buss A 800MHz CPU or faster for better performance Enough RAM to support New Moon 27/Firefox 45 ESR SSE and other Roytam1's Mozilla based browsers Ok now that we know the specs, how to install it? Installing the UOC Patch is a very easy process. Just go in your browser folder (C:\Program Files\Mozilla Firefox or Pale Moon or any other Mozilla based browser you use), then go in the "Defaults" then the "Pref" folder and extract the UOC_Patch38.js or UOC_Patch45.js you will find in their respective archive in the above folder and start the browser. The UOC Patch will be automatically applied alongside your existing preferences. But as a safety measure, do make a backup of your prefs.js file inside your profile folder, before launching the patched browser. In order to access your profile folder, you must make sure that the hidden folders are visible (if not, you must go in the Control Panel, then choose Folder Options, and tick the box that says "Show Hidden Folders"), then navigate to your Firefox/New Moon/Mozilla browser profile folder (i.e. C:\Documents and Settings\{Your Username}\Application Data\Mozilla\Firefox\Profiles\{Your Profile Folder}), you will find a file called "prefs.js". Make a copy of the file and rename it to "prefs.bak" to back it up. For K-Meleon users, check out Mathwiz's post below: What about the Macintosh? Installing the patch on the Macintosh is as simple as doing it on Windows. You just unzip the patch and put the UOC_Patch_Mac.js file into the following folder: Applications\[Browser folder]\Contents\Resources\Defaults\Pref The UOC Enforcer for 38 ESR browsers is the version that must be used with the Macintosh one. You can install the Enforcer on the Macintosh by putting the user.js file in the following directory: Macintosh HDD\Users\[Username]\Library\Application Support\[Browser Name]\Profiles\[Profile Name]\ In this way, you will have the UOC Patch for Macintosh and the Enforcer (38 ESR version) up and running on your Macintosh system as well. Enough with the words! I want to download it! Okay, okay. There you go. These are the download links for the UOC Patch. Remember, you must not absolutely use the UOC Patch for a particular codebase with a browser that uses a different one. You might experience issues. These two versions are conceived for the Firefox 38 ESR and 45 ESR codebases, so any fork of Firefox that uses those codebases, will work with their respective version of the patch. Choose carefully. UOC Patch for Firefox 38 ESR based browsers (i.e. New Moon 27, K-Meleon Goanna): Click Here UOC Patch for 38 ESR-based Macintosh and Linux browsers (i.e. Arctic Fox, Iceweasel 38): Click Here UOC Patch for Firefox 45 ESR based browsers (not compatible with Quantum): Click Here UOC Patch for Firefox 52 ESR* based browsers and upwards (not compatible with Quantum): Click Here PowerUOC Patch for TenFourFox: Click Here Introducing the UOC Enforcer UPDATE: The UOC Enforcer is now required if you want to enjoy the full optimizations for your old machine. The UOC Enforcer is a custom "user.js" file that acts as an add-on for the UOC Patch and must be placed into the browser's profile folder and tells the browser to change the "stubborn" entries in the about:config that are hardcoded by the developer, making the UOC Patch work even better. In order to install the UOC Enforcer, you must put the user.js file into your Firefox/New Moon/Pale Moon/Sea Monkey profile folder, that you can usually find at C:\Documents and Settings\User\Application Data\{Your Browser}\{Browser Name}\{Profile Folder} on XP and at C:\Users\{Username}\AppData\Roaming\{Your Browser}\{Browser Name}\{Profile Folder} on Vista and above. You must remember though that the UOC Enforcer doesn't let you change the edits from the about:config, so if you want to change a "stubborn" entry, you must edit the user.js file directly in your profile folder (you can do it with Notepad). UOC Enforcer for Firefox 38 ESR based browsers (i.e. New Moon 27, K-Meleon Goanna): Click Here UOC Enforcer for Firefox 45 ESR and 52 ESR based browsers and upwards (i.e. Firefox 45 ESR SSE, SeaMonkey, Basilisk/Serpent and upwards. Not compatible with Quantum): Click Here A Final Note Please, by all means, test the patch on as many systems as possible! The more the configurations, the better will be. Due to space constraints and lack of money, I don't have access to different systems I can test the patch with, and my Tualatin is the computer I used as a testbed for its development and so, I made it focusing on the hardware I had and currently have. The UOC Patch is not strictly limited to single core systems, but it can be used on any old and slow computer that runs Roytam1's Mozilla forks, it would be interesting to see if it can bring some benefits even on faster systems, or even slower ones: I don't have a Pentium II or an AMD/Intel Socket 7 system to test the patch with, otherwise I would have tried it on those too. There are some extensions I heartedly recommend to use alongside the UOC Patch to make the experience much better. These are: NoScript (I recommend v2.6.9.32 or v2.6.9.27 for New Moon, and v2.9.0.9 for Firefox 45 ESR SSE) Decentraleyes 1.4.2 Bluhell Firewall 2.5.3 UAControl 0.1.3.1.1 (To change the user agent on the fly, per website) uBlock Origin 1.10.0 And this one is optional, Youtube 2 Player, a nifty plugin that turns Youtube links into redirects to VLC, so whenever you click on a Youtube link, the video will be loaded automatically in VLC, thus saving resources and CPU cycles. Okay, that's all folks. Now if you want to throw rocks or tomatoes or veggies at me, feel free to do so. I developed this in my free time with a desire of curiosity and experimentation, to see if I can push my old machine to its extreme limit, and so far, at least personally, I'm quite satisfied. But as always, it's up to you to judge whether the UOC Patch is actually useful for your system, or it's an utter piece of garbage. Be aware I'm not responsible of any pandemy, nuclear warfare, space/time continuum and so on caused by your system. I upload the UOC Patch for experimental purposes, and it's provided AS IS. Happy RDD'ing! *: I do not recommend people to use Firefox 52 ESR based browsers (Serpent/Basilisk/Pale Moon 28/New Moon 28) on old computers, because the Mozilla developers have broken tiled compositing and nobody has ever bothered to fix that issue. So, if you want better performance with the UOC Patch, use Firefox 45 ESR SSE (which I recommend), New Moon 27, SeaMonkey (with the 52 ESR version of the UOC Patch) or K-Meleon Goanna. Particularly, I recommend Firefox 45 ESR SSE because it has fully working implementations of tiled compositing and APZ. the latter broken on Goanna based browsers. SeaMonkey uses the 52 ESR version of the UOC Patch due to a broken implementation of APZ.

As most of you, I have multiple computers and even different OSes on these computers (winXP included) Sometimes I want to have several versions of the same browser for the sake of testing. It can be done with portables but they have their own profile folder and keeping aligned would be a pain. To deal with this, I have created a batch menu to access to browsers and profile folders (previously organized). So I can copy browser/profiles folders from a computer to another and be sure that they will work (as far as they are compatible with target platform) I hope this batch script menu can be useful for you too.(*1) For example I have some browsers/profiles that I am used to "share" between WinXP and ReactOS. https://github.com/dapgo/Menu4multiple_Webrowsers/releases (*1) (Do always a backup of your profile before opening with a different browser on the same computer, Better safer than sorry ) With the exception of Palemoon, the other browser are XP compatible (eve ReactOS) Just copying folders from time to time I can keep almost align the different computers (power users can figure out about solutions based "real" time sync)