That's not true. There have been PDF.js exploits that lead straight to RCE. This has the additional downside of leading to immediate compromise on every platform.
You can't, there was a bug in my code when run on firefox fullscreen.
Formatting options would be nice, for now you can copy some text from an external HTML document and it will preserve the formatting. You can then edit this text.
Yeah right now there is only saving as the browser allows (print to PDF is another way). I'll add support for saving as a .txt on cmd-S through HTML5 download API in a bit.
wakes up 10 hours later to find this on HN homepage
Sorry, originally I had some functionality so that changing URL hash gives you a new file. At some point I switched this to using location.pathname and broke it. Let me add it back :)
Example (used by Mariusz Mlynski to win Pwn2Own this year): https://www.mozilla.org/en-US/security/advisories/mfsa2015-3...