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How do I change setting of Firefox to open MS Visio drawing instead downloads

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Hi Firefox v.28 I like Firefox and I don't wont use another browser How I can change Firefox to open MS Visio drawing instead downloads? Known solutions from Internet about change mimeTypes.rdf file do not help

Alexey

Hi Firefox v.28 I like Firefox and I don't wont use another browser How I can change Firefox to open MS Visio drawing instead downloads? Known solutions from Internet about change mimeTypes.rdf file do not help Alexey

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Where are you getting those drawings from?
Does that download location even pass-thru an appropriate MIME-Type?

Without a MIME-Type at all or an incorrect one, Firefox will default to downloading the file, and there isn't much to do about that.

Edit: Just found this add-on.
https://addons.mozilla.org/en-US/firefox/addon/free-visio-viewer/

Modified by the-edmeister