Firefox slowness issues have been getting worse, when is it going to be re-coded? none of the "FIXES" ever work and my other browsers work just fine.

Question

My frustrations with firefox continue to mount. All the supposed fixes are a waste of time. There is obviously a major code problem that needs to be addressed. Your solutions that you post just seem to be the same and never work. Users are not programmers and should not be expected to do your troubleshooting. I have been running a comparison lately using four different browsers to play a popular facebook game (Trainstation). (All browsers at the latest version)
1. Firefox
2. Internet Explorer
3. Google Chrome
4. Opera
to do the exact same thing in the game firefox was taking 20 to 30 seconds to complete (about half of the time completely freezing for several minutes.) where the next slowest browser (I.E.) was taking 2-3 seconds whilst opera was the fastest at almost instant, chrome almost as fast.
Firefox is also slow to load any page in general regardless of flash content.
Frequently I get "not responding" at the top of the window.
My system is a new Dell Inspiron with Intel Core I5 processor @ 2ghz and 6GB Ram, about 300GB free hard disk space. Windows 8.1
The game played requires the latest flash version which does not work on LINUX. However the linux firefox version is much faster. Perhaps there is a direct link for conflict with windows 8.1
Firefox also seems to have a memory leak, resources get dramatically worse if the browser is open for many hours. (this is not a problem with other browsers in general, except I.E. which exhibits this problem as well to a lesser degree. The freezing issue has also been a problem with Thunderbird lately as well, I do not have another e-mail client installed to compare to.

Answer 1

I have tried that already, I have seen that response in more than one forum in the past and it does not do anything. I also for the test of it, upgraded to the v29 beta version. Still is slow (not just the game i was playing which is on face book but also on the game developers site directly as well (http://portal.pixelfederation.com/trainstation/), using either does not matter as far as performance of the game. All sites and browsing is slower, as is startup loading my home page which is just google.com. I remember when firefox used to be blazing fast compared to others. I have also tried recreating a new profile, didn't help. tried a complete removal (including registry entries and all files, then a new fresh install, didn't help. someone on another forum suggested several tweaks in the about:config area, didn't help. something has changed dramatically in the last four or five versions. FYI:
Installed plugins
Java(TM) Platform SE 7 U51
File: npjp2.dll
Path: C:\Program Files (x86)\Java\jre7\bin\plugin2\npjp2.dll
Version: 10.51.2.13
State: Enabled
Next Generation Java Plug-in 10.51.2 for Mozilla browsers
Shockwave Flash
File: NPSWF32_12_0_0_77.dll
Path: C:\WINDOWS\SysWOW64\Macromed\Flash\NPSWF32_12_0_0_77.dll
Version: 12.0.0.77
State: Enabled
Shockwave Flash 12.0 r0
Unity Player
File: npUnity3D32.dll
Path: C:\Users\S\AppData\LocalLow\Unity\WebPlayer\loader\npUnity3D32.dll
Version: 4.3.5.32006
State: Enabled
Unity Player 4.3.5f1
Silverlight Plug-In
File: npctrl.dll
Path: c:\Program Files (x86)\Microsoft Silverlight\5.1.30214.0\npctrl.dll
Version: 5.1.30214.0
State: Enabled
5.1.30214.0
Shockwave for Director
File: np32dsw_1209149.dll
Path: C:\WINDOWS\SysWOW64\Adobe\Director\np32dsw_1209149.dll
Version: 12.0.9.149
State: Enabled
Adobe Shockwave for Director Netscape plug-in, version 12.0.9.149
McAfee SecurityCenter
File: npMcSnFFPl.dll
Path: c:\PROGRA~2\mcafee\msc\npMcSnFFPl.dll
Version: 12.8.934.0
State: Enabled
McAfee MSC FF plugin DLL
Adobe Acrobat
File: nppdf32.dll,nppdf32.dll
Path: C:\Program Files (x86)\Adobe\Reader 11.0\Reader\AIR\nppdf32.dll,C:\Program Files (x86)\Adobe\Reader 11.0\Reader\browser\nppdf32.dll
Version: 11.0.6.70
State: Enabled
Adobe PDF Plug-In For Firefox and Netscape 11.0.06
Intel® Identity Protection Technology
File: npIntelWebAPIIPT.dll
Path: C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT\npIntelWebAPIIPT.dll
Version: 2.1.42.0
State: Enabled
Intel web components for Intel® Identity Protection Technology
Intel® Identity Protection Technology
File: npIntelWebAPIUpdater.dll
Path: C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT\npIntelWebAPIUpdater.dll
Version: 2.1.42.0
State: Enabled
Intel web components updater - Installs and updates the Intel web components
Gamers Unite! Snag Bar v. 1.300.436 addon
Troubleshooter 1.1a (Firefox data to mozilla)