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Bug 1105109 is adding an APZ implementation of autoscrolling, behind the pref apz.autoscroll.enabled, which will initially be disabled by default. This bug tracks enabling enabling the pref by default.
Moving over Quantum tracking flags from bug 1105109.
Comment on attachment 8903694 [details] Bug 1385463 - Have APZ autoscrolling ride the trains. https://reviewboard.mozilla.org/r/175476/#review180576
Attachment #8903694 - Flags: review?(bugmail) → review+
Pushed by firstname.lastname@example.org: https://hg.mozilla.org/integration/autoland/rev/68c2a6565325 Have APZ autoscrolling ride the trains. r=kats
Botond, should that be mentioned in Firefox nightly/beta release notes?
(In reply to Pascal Chevrel:pascalc from comment #6) > Botond, should that be mentioned in Firefox nightly/beta release notes? Yep, I think that would be a good idea. APZ keyboard scrolling was enabled in 57 as well (bug 1376525), we should mention that too.
Release Note Request (optional, but appreciated) [Why is this notable]: Asynchronous scrolling provides a smoother / less janky scrolling experience for users. This bug brings async scrolling to the browser's "autoscroll" feature, one of the few remaining scrolling methods that don't have it yet. [Affects Firefox for Android]: No. (Technically, the answer may be "yes" - I'm not actually sure if autoscrolling works on Android, if it does then APZ will apply to it too - but as mouse input is very rare Android, it's not worth mentioning.) [Suggested wording]: The browser's "autoscrolling" feature now uses asynchronous scrolling, similar to other input methods like mousewheel, providing a smoother scrolling experience. [Links (documentation, blog post, etc)]: Nothing specifically for autoscrolling, but some links for APZ in general: wiki: https://wiki.mozilla.org/Platform/GFX/APZ blog post: https://blog.mozilla.org/firefox/smooth-scrolling-web-browser-removes-jank/
Marking as verified since checking that apz.autoscroll.enabled pref is set to true was tested for pre-Beta sign off in Firefox 57.0a1 across platforms.
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