Smooth scrolling/Test plan

Enable Smooth scrolling

Feature	Status	Lead engineer	QA Lead	Status
Enable Smooth scrolling	Landed	Jared Wein	Mihaela Velimiroviciu	Signed-off on Fx 13 beta 1

Summary

Smooth scrolling is the animated sliding effect when you roll the scrollwheel. Without it, the page jumps one or several lines at a time when scrolled. It's a subtle effect, but it makes it easier to follow content as it moves and is a more enjoyable effect. It also compares more closely to touch-based scrolling and so increases consistency across PCs and touch-based devices.

References

• Wiki page

Use Cases

• TBD

Test Cases

• The test cases for this feature can be viewed in Litmus under Firefox::Aurora::Aurora Basic Functional Tests (BFTs)::FX Aurora BFTs - Smooth Scrolling or here. Will be soon updated.

Important Bugs

Implementation bug

• 710372 - [snappy] smooth scrolling

Other bugs'

• bug 206438 - Smooth scrolling should use the 'smoothwheel' algorithm
• bug 736251 - smooth wheel precise scrolling isn't very responsive
• bug 725700 - Keyboard arrow keys and scrollbar buttons should have consistent scrolling distances
• bug 702463 - Make smooth scrolling use the refresh driver notifications instead of using its own timer
• bug 728153 - smooth scrolling waits 16ms before doing anything
• 'P1 bug 728738 - glitch in the smooth scroll animation
• bug 198964 - Enable smooth scrolling by default

Not Tested

• TBD

Sign off Criteria

• All the test cases were executed.
• All the major bugs have been fixed.

Sign-offs

• Firefox 13.0a2 (Aurora) sign-off - 2012-03-19
  • Verified option is available and enabled by default in preferences panel and about:config
  • Verified verticalScrollDistance is consistently applied to scrolling with arrow key and vertical scroll button
  • Verified smooth scrolling using spage bar, UP/DOWN key, vertical scroll buttons, mouse wheel, magic mouse
• Firefox 13.0 beta 1 sign-off - 2012-04-27