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After I updated Firefox 36 to 37.0.1 it uses a high percentage of CPU and it's slow and opens advertisement pages and pop-ups. I didn't install any add-ons.

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Today I opened Firefox 36 and saw that there's and update. I updated it to version 37.0.1. After I restarted the browser, I realized that it works very slow and opens an Advertisement pop-up with this address: http://offers.bycontext.com/scjs/tb/ctxjs/index.php?kw2=www.softgozar.com&affid=1145&subaff_id=888888000000000000&intformat=roll&nextpage=http%3A%2F%2Fwww.softgozar.com%2FWebPage%2FSoftwareDescription.aspx%3FSoftwareId%3D21%26Title%3DMozilla-Firefox-3701-Farsi-Cyberfox-3701-x64-Waterfox-3604-x64&ch=6801&sbrand=name&folder=v6.5.1&typrd=ctx&cu=31661&country=WW&original_country= It's really annoying. I didn't install any untrusted add-ons and my Firefox always updates itself from Mozilla. Please help. I really need it. Thanks.

Today I opened Firefox 36 and saw that there's and update. I updated it to version 37.0.1. After I restarted the browser, I realized that it works very slow and opens an Advertisement pop-up with this address: http://offers.bycontext.com/scjs/tb/ctxjs/index.php?kw2=www.softgozar.com&affid=1145&subaff_id=888888000000000000&intformat=roll&nextpage=http%3A%2F%2Fwww.softgozar.com%2FWebPage%2FSoftwareDescription.aspx%3FSoftwareId%3D21%26Title%3DMozilla-Firefox-3701-Farsi-Cyberfox-3701-x64-Waterfox-3604-x64&ch=6801&sbrand=name&folder=v6.5.1&typrd=ctx&cu=31661&country=WW&original_country= It's really annoying. I didn't install any untrusted add-ons and my Firefox always updates itself from Mozilla. Please help. I really need it. Thanks.

Chosen solution

Hello , sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one. Windows 8 has antivirus built-in already.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.


also, delete in your profile folder the User.js file you have.

The user.js file does not exist by default. If you create the file, forget it, if you have not create the file then delete the User.js file, to see if the problem goes away (some programs create and write in the file also).

thank you

Read this answer in context 0

Additional System Details

Installed Plug-ins

  • Adobe PDF Plug-In For Firefox and Netscape 11.0.01
  • Office Authorization plug-in for NPAPI browsers
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • DRM Netscape Network Object
  • DRM Store Netscape Plugin
  • Shockwave Flash 17.0 r0
  • Adobe Shockwave for Director Netscape plug-in, version 12.1.5.155
  • Unity Player 4.3.5f1
  • Npdsplay dll
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • Yahoo Application State Plugin version 1.0.0.7

Application

  • Firefox 37.0.1
  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:37.0) Gecko/20100101 Firefox/37.0
  • Support URL: https://support.mozilla.org/1/firefox/37.0.1/WINNT/en-US/

Extensions

  • Download YouTube Videos as MP4 1.8.1 ({b9bfaf1c-a63f-47cd-8b9a-29526ced9060})
  • IDM CC 7.3.99 (mozilla_cc@internetdownloadmanager.com)
  • New Tab Plus 4.6.2 (weidunewtab@gmail.com)
  • Weather Forecast 0.1.7 (jid1-aqwHRwQpv3JUMs@jetpack)
  • Microsoft .NET Framework Assistant 1.0 ({20a82645-c095-46ed-80e3-08825760534b}) (Inactive)
  • Print pages to PDF 0.1.9.3 (printPages2Pdf@reinhold.ripper) (Inactive)
  • SoftGozar Toolbar 2.1 (toolbar-tbplatform@alexa.com) (Inactive)
  • Video DownloadHelper 5.0.1 ({b9db16a4-6edc-47ec-a1f4-b86292ed211d}) (Inactive)
  • Web2PDF converter 1.12 ({e8f509f0-b677-11de-8a39-0800200c9a66}) (Inactive)

Javascript

  • incrementalGCEnabled: True

Graphics

  • adapterDescription: NVIDIA GeForce 6200 TurboCache(TM)
  • adapterDescription2:
  • adapterDeviceID: 0x0161
  • adapterDeviceID2:
  • adapterDrivers: nv4_disp
  • adapterDrivers2:
  • adapterRAM: Unknown
  • adapterRAM2:
  • adapterSubsysID: 00000000
  • adapterSubsysID2:
  • adapterVendorID: 0x10de
  • adapterVendorID2:
  • direct2DEnabled: False
  • direct2DEnabledMessage: [u'tryNewerDriver', u'182.65']
  • directWriteEnabled: False
  • directWriteVersion: 0.0.0.0
  • driverDate: 10-22-2006
  • driverDate2:
  • driverVersion: 6.14.10.9371
  • driverVersion2:
  • info: {u'AzureCanvasBackend': u'skia', u'AzureFallbackCanvasBackend': u'cairo', u'AzureContentBackend': u'cairo', u'AzureSkiaAccelerated': 0}
  • isGPU2Active: False
  • numAcceleratedWindows: 0
  • numAcceleratedWindowsMessage: [u'tryNewerDriver', u'182.65']
  • numTotalWindows: 1
  • webglRendererMessage: [u'tryNewerDriver', u'182.65']
  • windowLayerManagerRemote: True
  • windowLayerManagerType: Basic

Modified Preferences

Misc

  • User JS: Yes
  • Accessibility: No
ideato 893 solutions 6250 answers

Chosen Solution

Hello , sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one. Windows 8 has antivirus built-in already.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.


also, delete in your profile folder the User.js file you have.

The user.js file does not exist by default. If you create the file, forget it, if you have not create the file then delete the User.js file, to see if the problem goes away (some programs create and write in the file also).

thank you

Hello , sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of. You can try these free programs to scan for malware, which work with your existing antivirus software: * [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner] * [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware] * [http://support.kaspersky.com/viruses/disinfection/5350 Anti-Rootkit Utility - TDSSKiller] * [http://general-changelog-team.fr/en/downloads/viewdownload/20-outils-de-xplode/2-adwcleaner AdwCleaner] (for more info, see this [http://www.bleepingcomputer.com/download/adwcleaner/ alternate AdwCleaner download page]) * [http://www.surfright.nl/en/hitmanpro/ Hitman Pro] * [http://www.eset.com/us/online-scanner/ ESET Online Scanner] [http://windows.microsoft.com/MSE Microsoft Security Essentials] is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one. Windows 8 has antivirus [http://www.microsoft.com/security/pc-security/windows8.aspx#antivirus built-in] already. Further information can be found in the [[Troubleshoot Firefox issues caused by malware]] article. -------------------------------------------------------------------------------------------------- also, delete in your [http://kb.mozillazine.org/Profile_folder_-_Firefox#Windows profile folder] the [http://kb.mozillazine.org/User.js_file User.js file] you have. The user.js file '''does not exist by default'''. If you create the file, forget it, if you have not create the file then delete the User.js file, to see if the problem goes away (some programs create and write in the file also). thank you