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Internet Speed Much Lower In Firefox Than IE - Why?

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#1 GoshenBleeping


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Posted 21 March 2016 - 06:40 AM

OS: Windows 7 Home Premium 64 bit
 Hardware: ASUS laptop K52F
 ISP:  Frontier Communications
 Internet connection: DSL hard wired
 Internet speed:  3Mbps download
 Firefox version 45.0
 IE version 11.0.9600.18230
 Location: Morgantown, WV

I have a weird situation.  (I posted this to another forum without getting a good answer - although maybe there isn't any? - so am posting it here.)


I notice that my perceived Internet download speed is much higher in IE than Firefox. That is, pages load much faster in IE than in Firefox. This situation is something new over the past two weeks; never happened before. So I tried to gather data to support my perception. When I test the download speed (Speedtest.net), I get the following typical results (averaged over 5 tests for each browser):


 Download : Firefox 1.7-2.0 Mbps, IE 2.6-3.1 Mbps
 Upload: Firefox 0.7 Mbps , IE 0.7 Mbps
 Latency: 41ms for both


 -- Version 45.0 was updated over past 2 weeks ==> is this the problem??
 -- All extensions have been disabled
 -- Plug-ins enabled: Shockwave Flash, Silverlight, Primetime Content Decryption Module by Adobe, OpenH264 Video Codec by Cisco
 -- Configured to not remember history
 -- 'Refreshed' Firefox - no change


 Why should there be such a big difference between browsers?
 Is there a configuration change that would make a difference for Firefox?

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#2 GoshenBleeping

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Posted 21 March 2016 - 07:03 AM

Let me also add that the speed is also lower in Chrome.  That is, only using IE do I get the Internet download speed that I have paid for - a nominal 3Mbps.


Why does only IE deliver the speed?

#3 Niweg


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Posted 21 March 2016 - 11:18 AM

 I suspect your add-ons.  I have no such problem with Chrome or Firefox on my 4 desktops and 2 laptops.  The only add-on I use is Adblock Plus.


 Good luck.

Make regular full system backups or you'll be sorry sooner or later.

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