There is another issue here. I'm not sure if it is because me or all are experiencing it.
Each run after install, chromium is not able to cd into the designed ~/Downloads/ It looks like I am thrown into ~ and I can't move from there because of that error message. A good setup for this is run chrome --disable-unveil and set up the download directory, then run it normally with unveil and be able to use it. Also a big confusion with iridium is when the downloaded files are not accessible / are deleted / are not shown because of some potential danger to your computer. Seriously, Internet Explorer style? Didn't bother to investigate this, I don't run iridium anymore. It looks to me like chromium with some check marks disabled in settings.
