How to ignore "Content-Disposition: attachment" in Firefox

Legacy InlineDisposition 1.0.2.4 by Kai Liu can fix this problem.

In the Classic Add-ons Archive at:

• caa:addon/inlinedisposition

The "Open in browser" extension is useful for formats supported natively by the browser, not sure about PDF.

Legacy version 1.18 (for users of browsers such as Waterfox Classic) is in the Classic Add-ons Archive at:

• caa:addon/open-in-browser