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how do i add a download action for dxf files. firefox assumes its a text file and just opens it with no download action dialog box

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I want to add a download action for dxf files so they open in Autodesk trueview. The steps described here (http://support.mozilla.com/en-US/kb/Managing%20file%20types#w_adding-download-actions) say to click on a link for the filetype you want to add an action to but firefox thinks the dxf is a text file and just opens it in a new tab with no download action dialog box.

I want to add a download action for dxf files so they open in Autodesk trueview. The steps described here (http://support.mozilla.com/en-US/kb/Managing%20file%20types#w_adding-download-actions) say to click on a link for the filetype you want to add an action to but firefox thinks the dxf is a text file and just opens it in a new tab with no download action dialog box.

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Use the right-click context menu and choose "Save Link As" or hold down the alt key and left-click the link.

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That will allow me to save the file to a folder somewhere and then use windows explorer to open it. I'm interesting in having it open up in it's external viewer directly from firefox (like I have for pdfs) because I'm just quickly looking at it so I don't need to save it anywhere.

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If the server sends the file as text/plain, and Firefox showing it as text in a tab would suggest that, then your only option to view the file with a different program is to save the file and open it with that program.

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That makes sense. I'll have to try it on other sites and see if the same behavior exists. I'll report back here if it's just that one site. Thanks for your help!