Hi,

Could you please elaborate further on the issue you are having? Also, please provide us with your current operating system and current Firefox version.

Thanks

There is no smooth transition when websites make use of javascript animations. There is always lag.

This not only goes for the current version of firefox but any newer version up until nightly.

This problem is present in both Windows 7 and Windows 8.

The problem is also there in Android with both stable and nightly versions of Android (4.4.2)

Hi fnb, Thank you for elaborating. Currently the Nightly version of Firefox update more often then the stable releases of Firefox. It is on a rapid release cycle.

Do you happen to have the version number of nightly when this started happening? This can help narrow down what edits to look through :-)

Also the Telementary data sent on the browsers can help improve the performance. There are also automated tests done to check performance of different platforms.

If you are interested in providing a website example this could help create a bug. With the websites, there are have these tools to test the performance of the profile as well: This will test the javascript engine on desktop: https://developer.mozilla.org/en-US/d.../Reporting_a_Performance_Problem and for android local host builds these test can be reproduced here: https://developer.mozilla.org/en-US/d.../Profiling_with_the_Built-in_Profiler#Profiling_Firefox_mobile

There is also DTrace that can help optimize development on javascript pages https://wiki.mozilla.org/Performance/Optimizing_JavaScript_with_DTrace#Ti...

We look forward to your reply!

-D

This has always been a problem in Firefox and has never been addressed.

Thanks, that's cool, hopefully someone will pick this up.

Thanks I will look into it