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https://addons.mozilla.org/en-US/firefox/addon/user-agent-switcher/?id=59 please check this addon is used by people to harbour illegal activity on various webs


https://addons.mozilla.org/en-US/firefox/addon/user-agent-switcher/?id=59 please check this addon is used by people to harbour illegal activity on various webs including my website at http://www.HazratSultanBahu.com . Now lets define what this Addon Does Specifically and how its used to harbor illegal activity through firefox.

  • "User Agent Switcher" - allows you to act like you are GoogleBot or another search engine spider. Make sure you clear your cookies and browser cache before using this*

So we understand that the mere functionality of this bot is based on Faking itself to be illegally a Google Search Engine Bot or Any other Major Search Engine Bot and use of such addon with intentions to exploit other websites pretending itself to be google bot or msn bot or baidu bot can cause major problems to the website owners by exploiting their bandwidth with faking their identity to be google bot so they are never tracked back and secondly getting the website owners to block Authentic Google Bot + Fake Bot Results finally in their websites getting de-listed from the search engines and huge loss to bussiness.

In Conclusion this is a violation of Companies Authority and Websites Owners Property. If this Issue is not taken with care i will contact every responsible Authority and Companies itself to Take this Issue further higher up the Order and Purse its Legal Outcome using all Possible Means to Sue the Upheld Responsible Party and this Email will be used as evidence in court if required.

Additional System Details

Installed Plug-ins

  • Google Update
  • Shockwave Flash 11.4 r402
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Next Generation Java Plug-in 10.5.1 for Mozilla browsers
  • RealJukebox Netscape Plugin
  • RealNetworks(tm) RealPlayer Chrome Background Extension Plug-In
  • RealPlayer(tm) HTML5VideoShim Plug-In
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealPlayer Download Plugin
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • 5.1.10411.0
  • Adobe Shockwave for Director Netscape plug-in, version
  • Windows Activation Technologies Plugin for Mozilla
  • Yahoo Application State Plugin version
  • iTunes Detector Plug-in
  • Version 1.1.11, copyright 1996-2011 The VideoLAN Teamhttp://www.videolan.org/
  • LabVIEW 2011 Netscape Plug-in for Win32
  • LabVIEW 2010 Netscape Plug-in for Win32
  • LabVIEW 9.0 Netscape Plug-in for Win32
  • IMAQ 1.0 Netscape Plug-in for Win32
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers
  • LabVIEW 8.2 Netscape Plug-in for Win32
  • LabVIEW 8.6 Netscape Plug-in for Win32
  • LabVIEW 8.5 Netscape Plug-in for Win32
  • np-mswmp


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20100101 Firefox/15.0.1

More Information

Addon Removal - Immediate Action Required .

Tyler Downer
  • Administrator
  • Moderator
1164 solutions 6635 answers

Helpful Reply

There is nothing Illegal about changing your User Agent, and you don't even need this Add-on to do it, you can always manually change your User Agent. Changing user Agents is used for many valid reasons (a poorly made website will only display properly if it thinks that you are using X browser, a web designer wants to test what his website does in different situations, a user likes how a website looks in Desktop mode but he users a mobile phone, etc.).

There is nothing this add-on does that is Illegal, and it's a totally legitimate add-on. I don't see why you think even if someone changed their User Agent to Google bot that will cause loss of Revenue.

  • Top 10 Contributor
2353 solutions 20839 answers

The user agent string sent by the browser (or not sent by the browser) is information you cannot trust under any circumstances. In fact, many of the HTTP headers are untrustworthy, including HTTP_REFERER. Whether they are changed with an extension, or an external proxy, or other means, it is important to understand that you cannot rely on these strings to know what device or software is sending the request. (You also cannot trust bots to obey the robots.txt file, but that's another subject...)

Depending on the legal regime applicable to you and your network, your site's terms of use may or may not be enforceable. There may or may not be laws protecting your site against excessive use. Faking the user agent may or may not constitute unauthorized access. These are issues to address with your legal counsel.

I think the original purpose of the User Agent Switcher extension was as a tool for website developers to test differences in the page served to different browsers. It also was useful when some sites thought Firefox 1 was an older browser version than Netscape 6 (long, long ago), so that one could actually use the site. That seems legitimate to me.

I don't understand how the user agent string prevents you from "tracking back" who is accessing your site. In either case you get an IP address (which of course could be a proxy in either case), and you still can serve a link to Google Analytics or whatever other JavaScript-based tracking you employ.

If your site provides different content to different user agents, then you may be creating an incentive for users to lie to you. But why would you do that? I hope it's not so you can show real content in Google searches that then is blocked when users click through to your site. That is really annoying.

Finally, this is a support board. You may need to review the communication options on the Mozilla legal page as your next step: http://www.mozilla.org/en-US/about/legal.html.

Question owner

Well , If Mozilla is not Keen in Solving this Issue then they will be Dealing with Big Players of Market most definately Google, Msn and Bing are few names to Keep in Mind. This is A Direct Violation of Google Property and all related Parties in this case. Its Matter of Split seconds that mozilla may find themselves in trouble due their lacking in admiting their responsibility to protect other concerned groups being abused due to a Addon , It may sound simple but its Addon Consequences are Severe to All Those affected.

Tyler Downer
  • Administrator
  • Moderator
1164 solutions 6635 answers

As we said, this isn't Illegal, the add-on isn't doing anything wrong, and if you are doing questionable business practices on your website you should fix that. I'm going to lock this thread as this isn't a Firefox support Question.