Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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.

Learn More

Why Does Firefox Upload Double The Data Of The Original Filesize?

  • 1 reply
  • 1 has this problem
  • 4 views
  • Last reply by FredMcD

more options

When I upload ANYTHING on FIrefox... no matter what it is, video, image, any file or folder... it uploads Exactly double the filesize so this means I am waiting 2 times longer than I should.

On a basic way to put it. Firefox uploads a file that is 40MB but it actually uploads 80MB, but the file is still 40MB online even after download.. so I need to know why it uploads double size of everything?

When I upload ANYTHING on FIrefox... no matter what it is, video, image, any file or folder... it uploads Exactly double the filesize so this means I am waiting 2 times longer than I should. On a basic way to put it. Firefox uploads a file that is 40MB but it actually uploads 80MB, but the file is still 40MB online even after download.. so I need to know why it uploads double size of everything?

Modified by Nulgath

All Replies (1)

more options

What type of files? Do those files open properly?

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?