One of my uses of Firefox is as a tabbed reader. So I will have arxiv pdfs open, local pdfs etc. I would like to Sync these views across devices. It seems that Sync ignores any local tabs. For example file:////home/me/books/this_great_books.pdf I suspect this is to avoid syncing settings files. But is there a simple path-based over-ride for this? Or perhaps another extension would solve this.