How to make firefox read stdin?

echo '<h1>hello, world</h1>' | firefox cat index.html | firefox These commands don’t work. If firefox can read stdin, I can send HTML to firefox via a pipe. Is it possible to make firefox read stdin? Answers: Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you … Read more

Where does firefox get the “default” applications for opening files from?

By default, the Firefox (33.0) on my FreeBSD 11.0-CURRENT has the default application for opening PDF files set to Inkscape. Firefox does remember my previous choice, evince, in the “What should Firefox do with this file?” dialog, so until recently I was just confused where this configuration came from, but mostly ignored it because it did barely concern me.