User Agent: Mozilla/5.0 (Windows NT 5.1; rv:49.0) Gecko/20100101 Firefox/49.0 Build ID: 20160802125918 Steps to reproduce: No special action. Simply go to a page, text or graphics, and try using the scroll buttons (up/down) onscreen arrows. Version 39 for windows desktop was ok. The problem began with version 40 and persists through 49 (and probably higher) Actual results: Using onscreen scroll buttons (up/down arrows) results in in a rather jerky motion. All other methods of scrolling are butter smooth - wheel, mouse, keyboard, touchpad, all ok. It like a continual starting and stopping action. Start. Stop. Start. Stop. When the content is actually moving it's smooth for a half a second. Then it stops for a quarter second (more or less). And then starts again. It's the continual interruption of the smooth scrolling that's terribly annoying. Expected results: Expecting smooth continuous scrolling regardless which
User Agent: Mozilla/5.0 (Windows NT 5.1; rv:49.0) Gecko/20100101 Firefox/49.0 I have tested this issue on Windows XP x32 with the latest Firefox release (48.0), the latest Nightly (51.0a1-20160810030202), beta (49.0b2-20160808002253), Developer edition(50.0a2-20160810004000) and also with Firefox(39.0) and manage to reproduce it. Using the latest versions of Firefox I have observed that when using the onscreen scroll buttons (up/down arrows) there is a slightly interruption of the smooth scrolling. This can be observed on various websites (e.g. 9gag.com, facebook.com and other pages).
Status: UNCONFIRMED → NEW
Component: Untriaged → Layout
Ever confirmed: true
Product: Firefox → Core
You need to log in before you can comment on or make changes to this bug.