Have you tried updating the add-on? I believe PDF Exchange Viewer doesn't let you know automatically.<BR><BR>Which version of FF are you running? PDF EV works fine in 3.0.4. I had other issues with ...

Version 106 of Mozilla Firefox has been released, featuring a lot more functionality for the web browser's build-in PDF viewer. In a blog post on the Mozilla website, Firefox developers announced ...

The latest Mozilla Firefox web browser update places more focus on privacy, introduces PDF editing, and adds a new "Firefox View" tab history feature. Mozilla’s sales pitch for Firefox 106, announced ...