How to open excel file from firefox.

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Hi guys, I have a question I want to consult with you guys.

I have an web application project. for some clients there is a problem with opening xlsx attachments directly from firefox without saving.
When they open the attachment the format is damaged.
But when they save the attachment and then open it, there is no problem.
Dose anyone know what the problem can be?
Does anyone have an effective solution that can help me with this problem?
Thank's a lot!

What I have tried:

Update to the latest version of office

Posted 4-Sep-19 22:25pm

du lich

Updated 5-Sep-19 6:26am

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[no name] 5-Sep-19 8:17am

Don't let them do that. "Opening in FireFix WITHOUT saving" makes no sense to "most" people.

Dave Kreskowiak 5-Sep-19 8:39am

It is probably going to be a problem with the MIME type you set when the site returned the Excel file.

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RickZeeland · Answer 1 · 2019-09-05T06:26:00

Solution 1

Maybe you can install this add-on in FireFox: https://addons.mozilla.org/nl/firefox/addon/excel-xls-editor/[^]

Posted 5-Sep-19 6:26am

RickZeeland