Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Rohkem teavet

Teema arhiveeriti. Please ask a new question if you need help.

Why did firefox start uploading data from my computer (150 MB or more)?

  • 2 vastust
  • 1 on selline probleem
  • 25 views
  • Viimati vastas rlhospe

rlhospe
rlhospe
more options

I was logging into Google hangouts this evening when I noticed that Netlimiter was indicating a high upload rate, about 300 kB/sec, which is higher than my usual download rate. Firefox was indicated as the application responsible, and I throttled it down to 5 kB/sec and then shut it down completely before the upload behavior stopped. Another net utility I use indicated that firefox had uploaded 150 MB in that short time span.

I've been performing scans with Norton and MWB and getting negative results. I'm also not getting any results searching on google for exfiltration techniques using browsers. Any idea what's going on? I really don't like the idea of someone being able to suck massive amounts of data from my computer with the connivance of this browser.

I was logging into Google hangouts this evening when I noticed that Netlimiter was indicating a high upload rate, about 300 kB/sec, which is higher than my usual download rate. Firefox was indicated as the application responsible, and I throttled it down to 5 kB/sec and then shut it down completely before the upload behavior stopped. Another net utility I use indicated that firefox had uploaded 150 MB in that short time span. I've been performing scans with Norton and MWB and getting negative results. I'm also not getting any results searching on google for exfiltration techniques using browsers. Any idea what's going on? I really don't like the idea of someone being able to suck massive amounts of data from my computer with the connivance of this browser.

All Replies (2)

Mick
Mick
more options

Hi rlhospe,

Take a look at this article: How to stop Firefox from making automatic connections it may help :)

Muudetud Mick poolt

rlhospe
rlhospe Küsimuse esitaja
more options

If uploading telemetry data can result in uploads of hundreds of MB, then that answer seems plausible. I've turned off the permissions for "Firefox Data Collection and Use" in Options. I don't feel satisfied that this action will stop a recurrence of the observed problem, but it's worth a try. Thanks.