The spec is not making progress in https://github.com/whatwg/html/issues/1902 and it's causing sites real problems (e.g. see bug 1416728 comment 25). We should just unilaterally change our behavior here.

I agree - the current behaviour is unusable. We should make `window.open(url, "_blank", "noopener")` act exactly like `window.open(url, "_blank")` except that opener is not set.

MozReview-Commit-ID: 538GrCw85g

Comment on attachment 8992238 [details] Bug 1419960 - Make the noopener window feature not affect whether other window features are enabled, r=nika :Nika Layzell has approved the revision. https://phabricator.services.mozilla.com/D2150

Pushed by nlayzell@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/7122e56941ef Make the noopener window feature not affect whether other window features are enabled, r=nika

Please send an intent to ship for this? We should probably do something similar for noreferrer too, right?

(In reply to Boris Zbarsky [:bz] (no decent commit message means r-) from comment #5) > Please send an intent to ship for this? Anny, would you write up an intent to ship (https://wiki.mozilla.org/ExposureGuidelines#Intent_to_ship) - I can help you look over it before we send it to dev-platform. > We should probably do something similar for noreferrer too, right? IIRC we don't allow "noreferrer" as a window.open flag, but rather only allow it as a rel="" attribute. When it's used in that way it's already stripped out of the features string by nsDocShell::InternalLoad.

> IIRC we don't allow "noreferrer" as a window.open flag Ah, ok. I saw it in the test the patch for this bug modifies, but maybe there it's basically acting just like "nosuchflag" would...

I sent out an Intent to ship email to dev-platform (also see here https://groups.google.com/forum/#!topic/mozilla.dev.platform/6cTk_b1l6LE)

Probably worth making a note about this somewhere.

Posted the site compatibility note: https://www.fxsitecompat.com/en-CA/docs/2018/noopener-option-for-window-open-no-longer-affects-other-window-features/

Filed PR to update compat table for rel="noopener": https://github.com/mdn/browser-compat-data/pull/2748 And updated: https://developer.mozilla.org/en-US/docs/Web/API/Window/opener https://developer.mozilla.org/en-US/docs/Web/API/Window/open (noopener under window features) And updated Firefox 63 for developers.