Firefox 13 new default smooth scrolling leads to very slow grid scrolling

[mcouillard]

• Ext 4.1
• Stateful Array Grid Example
• Windows 7 32bit
• Firefox 13 stable (just released automatically)
  • Options > Advanced > Use Smooth Scrolling - was automatically checked true by the upgrade

Scroll any grid panel - you move pixel by pixel! Very, very slow. If you turn off the above default option, scrolling returns to it's normal snappy self.

I honestly can't say if this is a bug in Firefox 13 (it didn't happen in 12) or if it's related to ExtJS.

[jsakalos]

Hmm, I cannot observe this on Lion@MacBook Pro FF13, probably it is Win specific. I can move this thread to bugs so that the developer can take a look and sort out if it is an Ext bug or a Firefox bug.

[droessner]

I can confirm this bug using 4.1 on Windows XP Pro.

[fvanderbiest]

I also confirm the same behavior using 4.1 and FF 13.0 on Linux.
Manually unchecking "smooth scrolling" fixed the issue.

[thekikao]

i can confirm this bug, too.
using ext js 4.1 with linux (ubuntu) and firefox 13. this didn't happen before the upgrade from firefox 12 to 13.

[h.wagner@telekom.de]

I can confirm this too. It's not just the Grid scrolling, but all scroll bars in an ExtJS 4.1. application got much slower .

Thanks in advance.

[karlsnyder0]

We have just observed this issue also in Firefox 13. Chrome and IE are happy but Firefox is very sluggish.

[JohnnyHK]

Yep, same here. The Infinite Scrolling grid panel demo shows the problem in FF13 for me on both Windows 7 and Ubuntu 10: http://dev.sencha.com/deploy/ext-4.1.0-gpl/examples/grid/infinite-scroll.html

Even after turning off 'smooth scrolling' in Firefox it's still very sluggish and jerky.

[burnnat]

Seeing the same behavior here too... just updated to Firefox 13 on Win7 64-bit.

[billmex-media]

Same here.. Firefox 13, OSX 10.6.8