Hanging Browser in Vista

This is not a malware problem. Your logs are all clean.

I would have completely uninstalled and also very important, delete all the folders related to Firefox. Like the below:
C:\Users\Pioneer\AppData\Roaming\Mozilla\Firefox
C:\Program Files\Mozilla Firefox

Then I would have rebooted and reinstalled.

These are not problems. They are due to your antivirus program.

 

My best guess would be that it is due to the fact that your PC does not have an adequate amount of memory to properly run Vista and everything else you run ( especially your antivirus program ). Your logs show the below

Code:

Installed Physical Memory (RAM) 1.00 GB 
Total Physical Memory 1.00 GB 
Available Physical Memory 180 MB 

You only have 1 GB of memory and I recommend no less than 3 GB with Vista. Also have on 180 MB available will slow your PC down a lot. And the longer your browser is open, the more tabs you have open and the more surfing you do, the more memory your browser will need and you don't have enough. Thus it will start caching to disk and will get very slow.


Since you are not having malware problems, it is time to do our final steps:

1. We recommend you keep Malwarebytes Anti-Malware for scanning/removal of malware.
3. Renable your Disk Emulation software with Defogger if you had disabled it in step 4 of the READ & RUN ME.
4. Go to add/remove programs and uninstall HijackThis. If you don't see it or it will not uninstall, don't worry about it. Just move on to the next step.
5. If running Vista, Win 7 or Win 8, it is time to make sure you have reenabled UAC by double clicking on the C:\MGtools\enableUAC.reg file and allowing it to be added to the registry.
6. Now goto the C:\MGtools folder and find the MGclean.bat file. Double click ( if running Vista, Win7, or Win 8 Right Click and Run As Administrator ) on this file to run this cleanup program that will remove files and folders related to MGtools and some other items from our cleaning procedures.
8. Any other miscellaneous tools we may have had you install or download can be uninstalled and deleted.
10. After doing the above, you should work thru the below link:
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      How to Protect yourself from malware!