Welcome to SeaMonkey Add-ons.
Add extra features and styles to make SeaMonkey your own.Close
Rated 2 out of 5 stars
Works sometimes. I have a financial site that uses Content-Disposition = attachment for pdf files. It also uses Content-Type = Application/pdf.
Even with this add-on, for this site FF asks me to save the pdf and does not display it in FF.
Note: that in Preferences > Applications "Display in Firefox" is selected.