Firefox appending .xls extension to .xlsx files

2

We are serving files with the .xlsx (excel 2007/2010) extension. IE, Chrome, Safari all download the file and open excel just fine.

For some reason Firefox is appending .xls to the extension. I found this: https://support.mozilla.com/bs/questions/758363

However, the instructions weren't very specific and completely unclear to me.

How can I tell Firefox not to screw with the file extension?

I'm using 3.6.13 on Windows 7.

Thanks,

NotMe

Posted 2010-12-29T23:47:51.710

Reputation: 396

Resetting automatic actions, as indicated in the link you provided, is per client, so you'd have to change the setting on each install of Firefox. – None – 2010-12-30T02:14:58.247

@Randolph: Per client is okay as I'm just trying to fix two machines. I went through the instructions but that didn't work. Either the instructions are bad or I completely misunderstood what to do. – NotMe – 2010-12-30T15:20:26.887

it's entirely possible that your MIME types are messed up, especially with Firefox. I really don't know what to suggest if that page didn't help (though to be fair, I only read through it and didn't actually try anything). – None – 2010-12-30T20:51:48.413

Answers

1

Instead of changing Firefox, I found that the site in question was sending the wrong mime type for office 2007/2010 documents. Fortunately, they were kind enough to fix it.

I think Firefox ought to leave the extension alone, but I doubt that's going to change anytime soon given the severe lack of attention to the many bugs filed about it.

NotMe

Posted 2010-12-29T23:47:51.710

Reputation: 396

Asked: 2010-12-29T23:47:51.710

Viewed: 5 022 times

Active: 2011-02-16T08:28:47.493