Download slows down when Firefox is running

[paulpaulsenscreenshot]

I noticed a strange behaviour since yesterday when trying to download a game while running firefox. When i start a download i get the full downloadspeed. But when i open up firefox the DL speed drops right away and sometimes even reaches 0.

I just have to run FF without visiting any site (home tab). I dont get a throttled DL speed when using other game clients. I can download files via FF itself without any problems. After closing FF the DL sometimes gets back up, sometimes its stuck at a low level.

I have a recently installed system. Im running

Windows 10, 2004 (newest updates)
AMD CPU and X570 board, newest chipset drivers.
Kaspersky and Malwarebytes (tho i still have the problem after deinstalling them)

Anyone can confirm this or has a solution to the problem?

[Nx Machina]

I use Vivaldi so I cannot confirm the issue but would suggest contacting the Firefox developers to highlight a bug you may have found.

[paulpaulsenscreenshot]

Any other opinions? I bought Balders Gate 3 just before i noticed this behaviour for the first time. The promt before installing BG3 said i had to download ~80GB but the fully downloaded folder was only ~50Gb. I dont know if this has anything to do with my prob.

[Iceira]

Plenty but you seem skilled enough to know , idle issue to steam dl write at disk to close other task user pc resources ( windows resources manager )
you cant blaim steam or firefox before you figure out bottleneck.

you can find other post with samething , do note even own antivirus app has been caught in scan issue that can get to a standstill, because it can first scan then all files is recived. its a complex issue and you did not show pc spec they weak cpu you have the worse it get. as even Kusa mention what if you find a bug with that app, and yet its your job to locate it , or proof it.

ps.
you will see alot of skilled tech person can comment on this. but its your job to know every task running to know if you have a working pc , do not we seen alot of ppl complain over BG3 , and its performance, but that dont mean this is still your pc that pre-allocation issue or unpacking after that. most seem to get through it.

do note seen alot of complain over AMD is not that great a game pc compare to intel, even that is debatable. ( and it still end up with you have what you have and now have to live with it or check for bug or other cause. ) best advice show spec. noone here can help you without alot of detail, and you can time it every step , so you can get other user time on it.
you could have a defect cable to harddisk, to alot other issue that might not be so easy to ID.

[Iceira]

Kaspersky and Malwarebytes (tho i still have the problem after deinstalling them)

check own support site for uninstall app. even that is seen before ( most of the time ccleaner and other app can catch leftover files still effect system, or locate folder yourself and wipe folder even ccleaner cant remove a none attached leftover files in a folder.

do check install app, google them if you dont know them , do not remove them , untill you have a clue on system or user added content.

same as do not have 2 security that do scan, it should not be possible, but that can give alot of issue with performance.
most never do that but its actual possible, i have seen this decads ago.

[paulpaulsenscreenshot]

Specs are:

AMD 3700X
X570 Board
Geforce 2070 S
32GB RAM
NVMe, SSDs

Win 10 Home, 2004, all Updates

I barely install anything on the PC other than official drivers from reliable sources. I use the PC for streaming servies (Netflix, etc.) and Gaming from official sources (Steam, etc.). I dont even surf on this PC. I use FF with ublock and noscript from their official appstore. I could hardly do anything better to be sure i have a safe setup. Maybe not using 2 AV progs but i tested KIS, Malware, Steam and FF on a VM and didnt have any issues.

When i open up FF i dont see any movement in task-manager CPU or network wise. So its not like something working in the background.

I dont see any strange servies running.

[Iceira]

Originally posted by paulpaulsenscreenshot:

Specs are:

AMD 3700X
X570 Board
Geforce 2070 S
32GB RAM
NVMe, SSDs

Win 10 Home, 2004, all Updates

I barely install anything on the PC other than official drivers from reliable sources. I use the PC for streaming servies (Netflix, etc.) and Gaming from official sources (Steam, etc.). I dont even surf on this PC. I use FF with ublock and noscript from their official appstore. I could hardly do anything better to be sure i have a safe setup. Maybe not using 2 AV progs but i tested KIS, Malware, Steam and FF on a VM and didnt have any issues.

When i open up FF i dont see any movement in task-manager CPU or network wise. So its not like something working in the background.

I dont see any strange servies running.

can you test with FF in a blank page or check about and see if it missing a update.
many forget such, even chorme is seen to trigger upate that way,

but as you said no other things have cause this. and thats odd i have use FF because they other have fail me in the past, and that browser did not , again i think it depend what problem we get with them. maybe you found the cause or new bug. still your job to switch to other or is it your system that download other things in browser , dont forget they all have diffrent ways with load things first and last, its minor detail for most user but Edge, chrome and FF has always had this browser wars , most dont care about.
your should try change Default browser and contact FF maybe they have diffrent debug ways.

[Iceira]

there is diffrent browser way simplfyed privacy mode , maybe its one of them new things they have added as security that cause issue.

[Iceira]

you sure this is not a disk write and thats why you see dl drop to zero, that could expland alot you can find alot of steam user with pre-allcations issue and even DL after thats done and many mix up those 2 in what doing what.

change steam DL zone to test better matrix from diffrent angle, if we can call it that, ( know as congestions into steam and back from them )

do note other heated debat on this. i dont want to go there. confirm with other pc , to ruleout own issue and pc and network.

from network to pc and harddisk writes and OS performance , thats is indeed a mix of diffrent trouble shooting, any tech person can confirm that. (but seen from user point of view all same thing, things dont work like that. )
either way gl with faulth finding.

[Iceira]

are you browsing/download and writing and steam dl on same disk that could also be the case.
its sounds so stupid to even ask such, even that is ½ the throughput and make sense then you close it, steam will do more. ( but you dont sounds like a user that could make such mistake, but you could have forgot you did it. )

multi disk writes was once a big issue, most old tech windows user will never forget such 12hours time issue, and learn fast never do such.

this is way more complicated on newer pc, and old ways can soon be forgotten.

[paulpaulsenscreenshot]

Thx for your answers.

DL drops in Steam as soon as i open up FF. Even when im not "surfing". Im just on the starting page.

I tried installing steam games on different SSDs but its always the same problem. I have my system and thus FF installed on a separate SSD so theyre not on the same.

[Iceira]

Try contact Firefox support, you need better debug ways from them.

[Nx Machina]

Have you tried using a different browser?

[Iceira]

have you even try use Restore Firefox to default. ?

this is last entry from me, unless i get new idea.

[paulpaulsenscreenshot]

I tried different browser: no issues.

I have uninstalled FF, reinstalled: same issue.

Im trying an older FF version later today.

[Nx Machina]

Originally posted by paulpaulsenscreenshot:

I tried different browser: no issues.

I have uninstalled FF, reinstalled: same issue.

Im trying an older FF version later today.

Have you reported it as a bug to Firefox?

Maybe others are having the same issue or it is solely related to your PC such as a software conflict.