269784 - Mozilla Firefox rounds off Download Manager file sizes wrongly

Status: VERIFIED DUPLICATE of bug 260741

(Toolkit :: Downloads API, defect)

Description

[Reuben Chew]

User-Agent:       Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0

Take for example, the filesize of Mozilla Firefox 1.0 Gold.

The filesize is 4,918,270 bytes.

Internet Explorer renders it quite accurately at 4.68MB (actual is 
4.6904277801513671875MB), while the Mozilla Suite renders it as 4803kb, which 
is correct.

However, Mozilla Firefox renders it as 4.8MB, which is a large difference from 
4.68MB and 4803kb. At first I thought that it was because Firefox rendered them 
as MB by dividing by 1000 twice, but that would give 4.91MB, which would be 
even more inaccurate.

It seems that Mozilla Firefox divides it by 1024 to get the KB (4803kb), and 
then incorrectly converting it to MB by dividing it by 1000. It's very 
inconsistent and should be fixed ASAP to divide the KB to MB by 1024 instead of 
1000.

Reproducible: Always
Steps to Reproduce:
1. Download a file
2. Check the filesize inaccuracy

Actual Results:  
The filesize is rendered incorrectly.

Expected Results:  
The filesize should be rendered properly.

Comment 1

[:Gavin Sharp [email: [e-mail]]]

Could be as simple as changing the 1000's to 1024's at
http://lxr.mozilla.org/aviarybranch/source/toolkit/mozapps/downloads/content/DownloadProgressListener.js#175

Comment 2

[Phil Ringnalda (:philor)]

Let's go back to the earlier one, with a useful link to kB/KiB and MB/MiB

*** This bug has been marked as a duplicate of 260741 ***