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Firefox Consuming all available network bandwidth while doing nothing.

  • 9 përgjigje
  • 1 e ka hasur këtë problem
  • 17 parje
  • Përgjigjja më e re nga FredMcD

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Initially I thought this was nothing more than firefox trying to download an update... but as I work in IT, I noticed it was eating GBs of data rather quickly and even causing the network connection to fail. This was made abundantly clear that it wasn't an isolated case as now i'm starting to receive calls with similar issues.

I happen to work in a small village, and I provide services to the rural communities over a span of sometimes a few hundred miles, suffice it to say, majority of these users are LIMITED to either bandwidth capped connections as well as by todays standards, WELL BELOW national/international average speeds (1mbps-5mbps at most). So this situation is dire as if any single application such as Netflix is used on any device over such a connection, ALL other devices have utterly no hope of being able to even connect to say even google until whatever is eating it all up as fast as possible drops in it's consumption or stops entirely.

Keep in mind that the following situation is on a CLEAN machine with no other devices connected to a network, there are no 3rd party applications installed, all windows updates have been processed... nothing is using the network and no other problems, nothing but firefox is running, no background tasks of any kind outside of the default windows 10 and windows 10 is NOT setup to use onedrive or using an online Microsoft account (pure local).

Since the firefox 48.0.2 update, this has been a random problem, but it's become VERY problematic since the 49 update.

If you load the browser up and navigate with just that single tab... all mostly goes well, it has a low probability of suddenly for no apparent reason exhibiting the issue.... However if you either manually open a new tab which shows the new tab page or even if I set it to show a blank tab, firefox will instantly PEAK the maximum bandwidth that the internet provider can provide. The data being received doesn't make any coherent sense at all, and I can't seem to determine where/what it's connecting too... but the IP addressed shared by all the people affected is 151.101.124.193...

Again I've done CLEAN sweeps of a system.. for diskpart/low level formats.... did clean direct from a Microsoft windows 10 OEM disk and the moment it completed before even installing ANY other software, installed firefox straight away and get the same results almost every time. If an alternative browser is used, all is fine, Chrome, Microsoft Edge, even IE11, safari...etc...


Who is 151.101.124.193... and what does firefox insist on trying to download from there? Who IS ip lookup gives no answer and any of the virus/malware databases don't seem to show any activity even historically that would target this, specially since there is nothing being sent back for data.

I'd also submit troubleshooting information, but sadly, it won't let me due to firefox failing to work for the above reasons.

Initially I thought this was nothing more than firefox trying to download an update... but as I work in IT, I noticed it was eating GBs of data rather quickly and even causing the network connection to fail. This was made abundantly clear that it wasn't an isolated case as now i'm starting to receive calls with similar issues. I happen to work in a small village, and I provide services to the rural communities over a span of sometimes a few hundred miles, suffice it to say, majority of these users are LIMITED to either bandwidth capped connections as well as by todays standards, WELL BELOW national/international average speeds (1mbps-5mbps at most). So this situation is dire as if any single application such as Netflix is used on any device over such a connection, ALL other devices have utterly no hope of being able to even connect to say even google until whatever is eating it all up as fast as possible drops in it's consumption or stops entirely. Keep in mind that the following situation is on a CLEAN machine with no other devices connected to a network, there are no 3rd party applications installed, all windows updates have been processed... nothing is using the network and no other problems, nothing but firefox is running, no background tasks of any kind outside of the default windows 10 and windows 10 is NOT setup to use onedrive or using an online Microsoft account (pure local). Since the firefox 48.0.2 update, this has been a random problem, but it's become VERY problematic since the 49 update. If you load the browser up and navigate with just that single tab... all mostly goes well, it has a low probability of suddenly for no apparent reason exhibiting the issue.... However if you either manually open a new tab which shows the new tab page or even if I set it to show a blank tab, firefox will instantly PEAK the maximum bandwidth that the internet provider can provide. The data being received doesn't make any coherent sense at all, and I can't seem to determine where/what it's connecting too... but the IP addressed shared by all the people affected is 151.101.124.193... Again I've done CLEAN sweeps of a system.. for diskpart/low level formats.... did clean direct from a Microsoft windows 10 OEM disk and the moment it completed before even installing ANY other software, installed firefox straight away and get the same results almost every time. If an alternative browser is used, all is fine, Chrome, Microsoft Edge, even IE11, safari...etc... Who is 151.101.124.193... and what does firefox insist on trying to download from there? Who IS ip lookup gives no answer and any of the virus/malware databases don't seem to show any activity even historically that would target this, specially since there is nothing being sent back for data. I'd also submit troubleshooting information, but sadly, it won't let me due to firefox failing to work for the above reasons.

Krejt Përgjigjet (9)

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What is your computer system and Firefox?

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options)
key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

Is the problem still there?


Start your Computer in safe mode with networking. Then start Firefox. Try Safe websites. Is the problem still there?

Starting The Computer In Safe Mode;
Free Online Encyclopedia

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All the systems include anything from AMD as well as Intel based systems:

anything dating back as far as the AMD 939 socket systems such as an x2 3800+ or the intel Core 2 Duo 2180 on the LGA 775 socket P35 chipsets.

All are running with at least 4GB of ram, all are running 64bit Windows 10 Anniversary update (Version 1607 Build 14393.xxx)

Firefox 49.0.1 is currently installed on them all.

I cannot for the life of me find a common denominator still... as it's clearly not every single machine every single time... But they seem to share the same ip address that firefox is connecting to and then download boatloads of data.

If you want other components in terms of hardware, some machines have Samsung SSD's and some have a range of brands of various sizes as Standard hardrives with plenty of room... all have been checked for hardrive failures or oddities. All have different graphics adapters, most all share realtek audio.

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That IP address is part of a range assigned to a company called Fastly (https://www.fastly.com/) that operates a content distribution network (CDN). Since numerous sites may use a CDN, it may not be possible to identify the particular destination of the requests.

As a stopgap, can you have users disable the tiles on the new tab page to see whether that helps:

(1) In the address bar, type or paste about:config and press Enter/Return. Click the button promising to be careful.

(2) In the search box above the list, type or paste newt and pause while the list is filtered

(3) Double-click the browser.newtabpage.enabled preference to switch the value from true to false

That should cause the new tab page to display nothing but the "wheel" or "gear" icon on the right side. Any difference?

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Oh wait, I think you said you tested that by setting the page to show a blank tab, which is the same thing. Hmm...

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Yeah as I said.... I've tried that.... sometimes when a new tab is created, all seems to be well.. but if I switch back to the previous tab.... the ip address shows up again and starts just hammering the connection.

Can anyone at Mozilla at least tell me if that ip address is in any way associated with Mozilla at all even though the holder is fastly... what is that even?

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Sorry . . . wrong post

Ndryshuar nga FredMcD

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Sorry . . . . wrong post

Ndryshuar nga FredMcD

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151.101.124.193 - Po Box 78266, San Francisco, CA, 94107, US https://www.myip.ms/info/whois/151.101.124.193

IP Owner: Fastly Owner IP Range: 151.101.0.0 - 151.101.255.255 (65,536 ip) Owner Address: Po Box 78266, San Francisco, CA, 94107, US Owner Country: USA Owner Phone: +1-410-703-8240, +1-415-758-0146, +1-415-404-9374

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Fastly error: unknown domain: 151.101.124.193. Please check that this domain has been added to a service.