In Firefox 75, I intend to turn lazy load images on by default. Summary: lazy load images improves initial page load performance by deferring loading images which are out of viewport, it also reduces network traffic.
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1542784 Standard: https://github.com/whatwg/html/pull/3752 Platform coverage: all Preference: dom.image-lazy-loading.enabled Devtools bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1611387 Other browsers: Chrome has shipped it since 76. WebKit is now implementing it [1] web-platform-tests: https://wpt.fyi/results/loading/lazyload?label=experimental&label=master&aligned Secure contexts: this feature is not restricted to secure contexts. I don't see any reasons to restrict it in secure contexts. If you have concerns, please let me know. Is this feature enabled by default in sandboxed iframes?: no, as of now there is no proposed flag to enable this feature in sandboxed iframes. Bug to turn on by default: https://bugzilla.mozilla.org/show_bug.cgi?id=1613611 hiro [1] https://bugs.webkit.org/show_bug.cgi?id=200764 _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
