Right now, only messages coming from consoles created via console.createInstance print to stdout. I've discussed this with Andrea, and for consistency with Console.jsm and to allow for replacing things like NS_ASSERTION it would be good to always print to stdout if browser.dom.window.dump.enabled is true, as it is in local builds: https://searchfox.org/mozilla-central/rev/0c0ddaa7e859a2b76a56a0e2e9c0de88af166812/modules/libpref/init/all.js#1099

Comment on attachment 8952784 [details] [diff] [review] console1.patch Review of attachment 8952784 [details] [diff] [review]: ----------------------------------------------------------------- I was hoping this would only affect logs coming from chrome callers, i.e. loading `data:text/html,<script>console.log("hello");</script>` would not print to stdout. I'm not sure if there's a particular harm in it doing so, other than it just being noisy and people wanting to filter it out as evidenced by feature requests like Bug 1260877. Would it be easy to restrict this so content messages don't get printed?

Comment on attachment 8952792 [details] [diff] [review] console1.patch Review of attachment 8952792 [details] [diff] [review]: ----------------------------------------------------------------- ::: dom/console/Console.cpp @@ +826,5 @@ > } > } > > + // Let's enable the dumping to stdout by default for JSM. > + if (!mWindow && NS_IsMainThread()) { I also want to see logging to stdout for scripts loaded in chrome windows (i.e. browser.js). So could this be just `NS_IsMainThread()? Sorry for not being clear on the requirements in the bug description - I thought I wrote this down but it must've been on IRC.

Comment on attachment 8952804 [details] [diff] [review] console1.patch Review of attachment 8952804 [details] [diff] [review]: ----------------------------------------------------------------- Thanks, this works for me! Please update the commit message to indicate this is for chrome contexts only

Pushed by amarchesini@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/b192696c08a2 Console API should print logs on stdout when used by chrome code and if browser.dom.window.dump.enabled is true, r=bgrins