Firefox 13 smooth scrolling changed?

[dbcooper.dk]

Thanks Squall.

I have also been having a weird problem where (only with Firefox) mousewheel scrolling switches from 6 lines per increment to 3 lines.

[streetwolf]

n/m

[Chrysalis]

I got mine fixed now, 2 of the settings I changed were wrong as for some reason they got renamed.

[streetwolf]

I got mine fixed now, 2 of the settings I changed were wrong as for some reason they got renamed.

Would you care to share them with us?

[Cyberbeing]

After updating to Firefox 16 RC1, it seems that the newly unprefixed CSS3 animations can be extremely GPU heavy. Unfortunately CSS3 is also affected layout.frame_rate, which make raising the value no longer a good solution unless you have a somewhat powerful GPU. Check your GPU load with the following page when tweaking layout.frame_rate, since you probably want to keep avg load below 50% so your GPU has resources free to do scrolling and other things: http://www.mediafire.com/?bgsm6g8oazivwsg

On the bright side, it does seem that fx16 scrolls a bit nicer than fx15 with a 1:1 layout.frame_rate:refresh_rate ratio.

[Omega X]

I'd rather the GPU than the CPU. Firefox & Opera uses 30% CPU constant for that animation without HWA. Where as my GPU load heartbeats to 35% every few seconds, but stays at 3D clocks instead of 2D clocks.

[Cyberbeing]

It is good that it uses GPU for the CSS3 animations, but when combined with a weaker GPU like my GT440 DDR5, setting layout.frame_rate=240 results in a solid 99% load @3D clocks when displaying that page.

Solid 30% GPU load on that page with layout.frame_rate=60, +20% when scrolling.
Solid 55% GPU load on that page with layout.frame_rate=120, +30% when scrolling.
Solid 99% GPU load on that page with layout.frame_rate=240, +??% when scrolling.

It just makes me reconsider use of the layout.frame_rate with high values to improve smooth scrolling performance on this computer.

[Omega X]

It might be worth filing a bug.

[LordStriker]

It still feels horrible. It's so horrible i've switched to Opera because of it. Which unsuprisingly scrolls super smoothly and still feels responsive while doing it. What the hell were they thinking at Mozilla when they thought this would be cool is beyond me...

Opera is the only browser with smooth scrolling close to IE9; fast and fluid. It's truly good but currently it has problem, likewise, on some certain websites ( it's known ).

By the way, in 17 beta begun the Nightly's choppiness on me.

[patrickjdempsey]

After updating to Firefox 16 RC1, it seems that the newly unprefixed CSS3 animations can be extremely GPU heavy.

CSS animations have always been resource intensive. That's why Mozilla has had to be careful about how much it uses in the default theme. There is nothing particularly special about the "newly unprefixed" animations except that you are more likely to encounter websites that use the unprefixed versions than the old prefixed versions. This is largely because Apple and Google have had a habit of shipping browsers for the last few years with unprefixed versions of CSS properties so that has encouraged authors to use them in the wild.

[_Alexander]

I think it is time to blacklist all GPUs below GT440 /s

[Omega X]

Blacklisting Heras are even better.

[dbcooper.dk]

It still feels horrible. It's so horrible i've switched to Opera because of it. Which unsuprisingly scrolls super smoothly and still feels responsive while doing it. What the hell were they thinking at Mozilla when they thought this would be cool is beyond me...

Opera is the only browser with smooth scrolling close to IE9; fast and fluid. It's truly good but currently it has problem, likewise, on some certain websites ( it's known ).

By the way, in 17 beta begun the Nightly's choppiness on me.

Chrome's "experimental" smooth scrolling is really good too. They have OMTC.

[Chrysalis]

I got mine fixed now, 2 of the settings I changed were wrong as for some reason they got renamed.

Would you care to share them with us?

general.smoothScroll.durationToIntervalRatio 100
general.smoothScroll.mouseWheel.durationMaxMS 250
general.smoothScroll.mouseWheel.durationMinMS 250
general.smoothScroll.lines.durationMaxMS 50
general.smoothScroll.lines.durationMinMS 50

[Chrysalis]

I'd rather the GPU than the CPU. Firefox & Opera uses 30% CPU constant for that animation without HWA. Where as my GPU load heartbeats to 35% every few seconds, but stays at 3D clocks instead of 2D clocks.

a workaround is nvidia inspector, if the GPU is powerful enough then even locked in 2D mode its better than cpu for graphic processing. As a benchmark my 460 GTX in 2d mode beats software mode for performance. So can still use hardware mode and keep GPU in low power mode.