789747 - Slow and jerky slideshow on http://iweb.com/ since Firefox 16

Status: RESOLVED FIXED

(Web Compatibility :: Site Reports, defect)

Description

[Loic]

STR: open http://iweb.com/

Firefox displays a white overlay which disappears progressively when the website is loading. In addition the slideshow is jerky and slow (click on the dots to animate).

Mozreg range:

m-c
good=2012-07-09
bad=2012-07-10
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=b6fb3d9bd1b9&tochange=02b26fb307b4

m-i
good=2012-07-08
bad=2012-07-09
http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=fa1bf35aae2e&tochange=8129536fb25c

Comment 1

[ferongr]

Profile trace. Doesn't look like a performance issue

http://people.mozilla.com/~bgirard/cleopatra/?report=92285549af462185f5314011c4c0bc2e36d0a128

I'd hazard a guess that the issue here is the unprefixing of CSS animation properties in Bug 762302 that broke the page. Editing the transition property at line 954 of /screen.css to have a 1 second value (as opposed to 20) makes the switching mostly smooth. You can use the style sidebar to do this on the fly after selecting one of the slide elements). The fact they don't pause but keep scrolling could be a similar issue too.

(Why was I CC'ed? Anyway, I was bored so it doesn't matter.)

Comment 2

[ferongr]

(Disregard the last sentence, I CC'ed myself yesterday)

Comment 3

[Alice0775 White]

This issue happens after landing Bug 762303.

The problem is the following CSS
* {
  transition: all 20s !important; }
in http://iweb.com/sites/default/themes/privatewhisper/assets/css/screen.css

So, I think this is the site problem,

Comment 4

[Boris Zbarsky [:bzbarsky]]

Did anyone contact the site yet?  Or should I?

Comment 5

[Boris Zbarsky [:bzbarsky]]

I sent them some mail...

Comment 6

[Karl Dubost💡 :karlcow]

tested with Firefox 32.0.3 and working