1292507 - When opening .xlsm files , FF ESR 38.8 and FF 45.2.0 add's .xlsx

Status: RESOLVED INVALID

(Firefox :: File Handling, defect)

Description

[[e-mail]]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0
Build ID: 20160726073904

Steps to reproduce:

When opening .xlsm files , 
FF ESR 38.8 and FF 45.2.0 add's an ".xlsx" to filename.xlsm  >> filename.xlsm.xlsx
when saving first, filename.xlsm is downloaded and than opening from download menue it works. 




Actual results:

get an error from excel 2010/2013 >> corupted file ....


Expected results:

directly opening like save and then open

Comment 1

[Tooru Fujisawa [:arai]]

Can you provide the URL of the xlsx file?

Comment 2

[[e-mail]]

Attachment: CLASSSTRUCTURE ODIV_proposal.xlsm

Comment 3

[[e-mail]]

Attachment: 2016-08-08 11_43_15-pic.gif

Errormessage !!

Comment 4

[[e-mail]]

The file to open is an .xlsm 
Look at attached errormessage >> there you can see that FF enters '.xlsx' !!

Comment 5

[Tooru Fujisawa [:arai]]

It would be related to Content-Type the server returns.
Does the same issue happen with attachment 8778821 [details] ?

Comment 6

[[e-mail]]

... when i open click on attachment 8778821 [details] : works fine

Comment 7

[Tooru Fujisawa [:arai]]

What's the original URL the issue happens?

Comment 8

[[e-mail]]

depends on mantis behaviour  which causes the error - not FF -- 
thx a lott

Comment 9

[Patrice33740]

The bug occurs with the current version Firefox 58.0.1 (32bits) under the following conditions:
- Only with the website http://www.cjoint.com
- Only with Excel files with a macro that has the extension .xlsm
- Only with the Open command, the problem does not occur with the Save File command.

What is happening:
- Firefox adds an extra .xlsx extension to the name of the file that is downloaded.
- When starting Excel, an error message indicating that the format is not recognized.

A link to an Excel.xlsm file on the site on the cjoint.com website:
https://www.cjoint.com/c/GGBgvougUYM

The images that illustrate this bug:
Open Excel File command with .xlsm extension:
https://www.cjoint.com/c/HBgkR5eWcY5

The name of the temporary file saved:
https://www.cjoint.com/c/HBgkSJBmES5

The error message from Excel:
https://www.cjoint.com/c/HBgkS4jy865

Comment 10

[Patrice33740]

The bug also occurs with the current version Firefox 60.0.2 (32bits)

Comment 11

[Patrice33740]

The bug also occurs with the current version Firefox 62.0.2 (32bits) and Windows 10 1083

Comment 12

[Patrice33740]

The bug always occurs with the current version Firefox 63.0.3 (32bits) and Windows 10 1083

Comment 13

[m-o-m]

Attachment: temp01.png

I can confirm this error is still occurring. I regularly have Clients complaining that they cannot open my XLSM files because they get an error message that the file is corrupt and is in XLSX format - see attached image as an example. It turns out that the culprit is Firefox. It changes file format upon download from XLSM to XLSX which makes the file unreadable in Microsoft Excel. Using Chrome fixes the issue. But this is not what Clients want to hear if they use Firefox. Could I request a fix for this problem please?