I have long-loved this Add-on but recently get a pop-up once actived, that says Internet connection is lost. It isn't. Only occurs when PDFing anything on FBook, on Firefox - and only when using this Add-on. It seems to disappear after if I scroll to bottom of page, but I invariably forget and it ends up on every PDF'd page so I have to repeat the task . I have no idea what is causing it to pop up, have looked in configs but nothing in there. Can only assume its something in the Add-on that's causing it to false positive.