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About this Add-on
Update: Now also works with the pdf plugin.
I find it annoying, that you can't open all pdf's in Firefox by using 'Preview in Firefox' option.
So, i created this addon.
This addon will:
1) Fix the mimetype (e.g. application/octet-stream)
2) It will change attachment header to inline (so you can preview the pdf inside Firefox)
How it works:
This addon will first 'sniff' for a pdf, and if it founds one, it will check if there is a Content-Disposition attachment header and if found, it will change it to inline and finally returning the new content type.
Recommended addon: pdfviewerswitcher
This addon using nsIContentSniffer.