I get this everyday on my computer. 503 Service Unavailable I do not get this anywhere else

Question

503 Service Unavailable I get this everyday when I browse my blogs and other websites. All these websites can not be down. What is the problem.

Answer 1

Information About Your Browser
Your browser supplies the following information to sites about itself. This is not a comprehensive list of all information available to the page.
Data from HTTP Headers
Your browser's request includes the following data:
Browser "User Agent" string: Mozilla/5.0 (Windows NT 5.1; rv:27.0) Gecko/20100101 Firefox/27.0 AlexaToolbar/alxf-2.19
Your public IP address: 108.209.182.166 (REMOTE_ADDR)
Referring page (if any): https://support.mozilla.org/en-US/questions/983427?esab=a&as=aaq
Full HTTP Request Headers:
Host: jeffersonscher.com
User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:27.0) Gecko/20100101 Firefox/27.0 AlexaToolbar/alxf-2.19
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: https://support.mozilla.org/en-US/questions/983427?esab=a&as=aaq
Connection: keep-alive
JavaScript Browser Tests
navigator object properties
Scripts in web pages can check various properties of the navigator object. This information can be blocked or overridden by the user.
navigator.userAgent = Mozilla/5.0 (Windows NT 5.1; rv:27.0) Gecko/20100101 Firefox/27.0
navigator.appName = Netscape
navigator.appCodeName = Mozilla
navigator.appVersion = 5.0 (Windows)
navigator.platform = Win32
Active plugins (navigator.plugins collection, does not show "Never Activate" plugins):
Name (Version): Adobe Acrobat (10.1.9.22)
Description: Adobe PDF Plug-In For Firefox and Netscape 10.1.9
File name: nppdf32.dll
Name (Version): BrowserPlus (from Yahoo!) v2.9.8 (2.9.8.0)
Description: BrowserPlus -- Improve your browser! -- http://browserplus.yahoo.com/
File name: npybrowserplus_2.9.8.dll
Name (Version): Citrix Online Web Deployment Plugin 1.0.0.104 (1.0.0.104)
Description: Citrix Online App Detector Plugin
File name: npappdetector.dll
Name (Version): Google Talk Plugin (5.1.4.17398)
Description: Version 5.1.4.17398
File name: npgoogletalk.dll
Name (Version): Google Talk Plugin Video Accelerator (0.1.44.29)
Description: Google Talk Plugin Video Accelerator version:0.1.44.29
File name: npgtpo3dautoplugin.dll
Name (Version): Google Talk Plugin Video Renderer (5.1.4.17398)
Description: Version 5.1.4.17398
File name: npo1d.dll
Name (Version): Google Update (1.3.22.5)
Description: Google Update
File name: npGoogleUpdate3.dll
Name (Version): Java Deployment Toolkit 7.0.510.13 (10.51.2.13)
Description: NPRuntime Script Plug-in Library for Java(TM) Deploy
File name: npdeployJava1.dll
Name (Version): Java(TM) Platform SE 7 U51 (10.51.2.13)
Description: Next Generation Java Plug-in 10.51.2 for Mozilla browsers
File name: npjp2.dll
Name (Version): Microsoft® DRM (9.0.0.4503)
Description: DRM Netscape Network Object
File name: npdrmv2.dll
Name (Version): Microsoft® DRM (9.0.0.4503)
Description: DRM Store Netscape Plugin
File name: npwmsdrm.dll
Name (Version): QuickTime Plug-in 7.7.4 (7.7.4.0)
Description: The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
File name: npqtplugin.dll
Name (Version): QuickTime Plug-in 7.7.4 (7.7.4.0)
Description: The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
File name: npqtplugin2.dll
Name (Version): QuickTime Plug-in 7.7.4 (7.7.4.0)
Description: The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
File name: npqtplugin3.dll
Name (Version): QuickTime Plug-in 7.7.4 (7.7.4.0)
Description: The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
File name: npqtplugin4.dll
Name (Version): QuickTime Plug-in 7.7.4 (7.7.4.0)
Description: The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
File name: npqtplugin5.dll
Name (Version): RealDownloader Plugin (1.3.3.66)
Description: RealDownloader Plugin
File name: npdlplugin.dll
Name (Version): RealNetworks(tm) RealDownloader Chrome Background Extension Plug-In (32-bit) (1.3.3.66)
Description: RealNetworks(tm) RealDownloader Chrome Background Extension Plug-In
File name: nprndlchromebrowserrecordext.dll
Name (Version): RealNetworks(tm) RealDownloader HTML5VideoShim Plug-In (32-bit) (1.3.3.66)
Description: RealNetworks(tm) RealDownloader HTML5VideoShim Plug-In
File name: nprndlhtml5videoshim.dll
Name (Version): RealNetworks(tm) RealDownloader PepperFlashVideoShim Plug-In (32-bit) (1.3.3.66)
Description: RealNetworks(tm) RealDownloader PepperFlashVideoShim Plug-In
File name: nprndlpepperflashvideoshim.dll
Name (Version): RealPlayer Download Plugin (16.0.3.51)
Description: RealPlayer Download Plugin
File name: nprpplugin.dll
Name (Version): RealPlayer(tm) G2 LiveConnect-Enabled Plug-In (32-bit) (16.0.3.51)
Description: RealPlayer(tm) LiveConnect-Enabled Plug-In
File name: nppl3260.dll
Name (Version): Shockwave Flash (12.0.0.70)
Description: Shockwave Flash 12.0 r0
File name: NPSWF32_12_0_0_70.dll
Name (Version): Silverlight Plug-In (5.1.20913.0)
Description: 5.1.20913.0
File name: npctrl.dll
Name (Version): Windows Media Player Plug-in Dynamic Link Library (3.0.2.629)
Description: Npdsplay dll
File name: npdsplay.dll
Name (Version): Windows Presentation Foundation (3.5.30729.1)
Description: Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
File name: NPWPF.dll
Name (Version): Yahoo Application State Plugin (1.0.0.7)
Description: Yahoo Application State Plugin version 1.0.0.7
File name: npYState.dll
Name (Version): iTunes Application Detector (1.0.1.1)
Description: iTunes Detector Plug-in
File name: npitunes.dll
DOM object detection: objects/methods/collections
As a more reliable indication of a browser's capabilities, scripts can check for the existence of various objects and properties:
if(document.getElementById) = true; // all modern browsers support this method
if(document.layers) = false; // this collection identifies Netscape version 4 only
if(document.all) = false; // this object works in IE4-8 and emulations thereof
Copyright © 2013 Jefferson Scher. Updated 12/24/2013.