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[dev-platform] Make
and
behave more like
for image loading.</span></a></span> </h1> <p class="darkgray font13"> <span class="sender pipe"><a href="/search?l=dev-platform@mozilla.org&q=from:%22Andreas+Farre%22" rel="nofollow"><span itemprop="author" itemscope itemtype="http://schema.org/Person"><span itemprop="name">Andreas Farre</span></span></a></span> <span class="date"><a href="/search?l=dev-platform@mozilla.org&q=date:20220629" rel="nofollow">Wed, 29 Jun 2022 08:40:14 -0700</a></span> </p> </div> <div itemprop="articleBody" class="msgBody"> <!--X-Body-of-Message--> <pre>I'm currently working on implementing Opaque Response Blocking (ORB), and one part I'm going to try out is to have <embed> and <object> elements load images in synthetic documents, just like how <iframe> does (<a rel="nofollow" href="https://phabricator.services.mozilla.com/D148117">https://phabricator.services.mozilla.com/D148117</a>). This makes the ORB implementation simpler, since I can then handle cross origin requests just like how we do process switching for cross origin documents.</pre><pre> This is not really how spec describes image loading for <embed> and <object>, but initially I will try to adhere to spec as much as possible, but there's also discussions changing the spec <a rel="nofollow" href="https://github.com/whatwg/html/issues/7939">https://github.com/whatwg/html/issues/7939</a>. This is currently in review at <a rel="nofollow" href="https://phabricator.services.mozilla.com/D148117">https://phabricator.services.mozilla.com/D148117</a> and I'm hoping to land it soon. The number of tests that I've needed to change have turned out to be fairly low <a rel="nofollow" href="https://phabricator.services.mozilla.com/D148118">https://phabricator.services.mozilla.com/D148118</a>, and hopefully the visibility of this change to web pages should be minimal. One place where there will be a known observable difference is in DevTools, where there now will be a browsing context/document as a child to either the <embed> or <object> element. My intention is to have this turned on for Nightly only, with prefs in place to quickly have it turned off. That pref is: browser.opaqueResponseBlocking.syntheticBrowsingContext I've also added a bonus pref that depends on the previous to turn off the spec adhering hacks (essentially to hide browsing contexts from `Window.frames`, named targeting etc). That pref is: browser.opaqueResponseBlocking.syntheticBrowsingContext.filter Since this is a bit on the experimental side, I'd be very happy if I could have your help to keep extra eyes on any breakage that happens due to this. I'll make sure to send a follow-up as soon as I land this. Opinions before landing are of course also welcome! -- farre -- You received this message because you are subscribed to the Google Groups "dev-platform@mozilla.org" group. 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