Iframe lazy loading is now being shipped in 121. Bug to enable <https://bugzilla.mozilla.org/show_bug.cgi?id=1860729>.
On Thu, Oct 19, 2023 at 4:55 PM Oliver Medhurst <[email protected]> wrote: > This has just been delayed a cycle (now likely Firefox 121 instead of 120) > due to some bugs found in Nightly. Remaining enabled in Nightly but not > beta or release yet. > > On Wed, Oct 18, 2023 at 3:10 PM Oliver Medhurst <[email protected]> > wrote: > >> As of today (Firefox 120), I intend to turn on iframe lazy loading by >> default on all platforms. It has a flag (dom.iframe_lazy_loading.enabled), >> but it is being enabled by default in the same implementation patch as it >> is a low-risk feature and we pass web platform tests. Chromium and WebKit >> already ship it at this time. >> >> Summary: >> Lazy loading iframes (<iframe loading=lazy>) allow websites to defer >> loading an iframe until it is in view to speed up first page loads and >> reduce initial network usage by specifying the element's loading attribute >> as "lazy". We have supported lazy loading images since Firefox 75. >> >> Bug: https://bugzil.la/1622090 >> Specification: https://html.spec.whatwg.org/#attr-iframe-loading >> Standards body: WHATWG (HTML) >> Platform coverage: All >> >> Preference: dom.iframe_lazy_loading.enabled (on by default) >> DevTools bug: None >> Standards position: >> https://github.com/mozilla/standards-positions/issues/840 >> >> Other browsers: >> - Blink: Shipped since Chrome 77 >> - WebKit: Shipped since Safari 16.4 >> >> Web platform tests: >> https://wpt.fyi/results/html/semantics/embedded-content/the-iframe-element?q=lazy >> (I also plan to add more for edge cases in the patch and future) >> > -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/CAKxzt6a7G_uMnV8RS2-nv8yH%2Bapvu5bMSQfK3dgNwoR-E%2Bx%2BSg%40mail.gmail.com.
