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Youtube HTML5 player lags on mouse move (high poling rate bug)

  • 1 reply
  • 1 has this problem
  • 7 views
  • Last reply by guigs

JamesHeald
JamesHeald
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Specs: Windows 7 Ultimate x64 16GB DDR 3 Ram Nvidia GTX 970 4GB Intel Core i7 2600k @ stock Sentinel SGM-6001 (high DPI mouse)

All you have to do to replicate this bug is launch Firefox and go to any Youtube video and start moving your cursor around, which causes terrible lag.

I've wanted to switch to Firefox for years but but this bug has stopped me. This is a bug a lot of people have had trouble with but sadly not much attention has been driven to it and people have resorted to (like me) just using another browser.

The users in the bug report above say its just Flash, which in some cases it may be but in my case its HTML 5 videos that are having issues...

CPU Usage seems to sky rocket when moving your cursor if thats any help.

Heres a video demonstrating the issue: https://vid.me/R4O2

I have tried disabling and enabling hardware acceleration both to no avail, along

I've tried using a different mouse and it works completely fine. Ive also tried Waterfox and that has the same issue.

Does anyone have any updates on the progress of this bug? Its really sad that not enough attention has been bought to it! I really want to switch to Firefox but its simply unusable right now.

Specs: Windows 7 Ultimate x64 16GB DDR 3 Ram Nvidia GTX 970 4GB Intel Core i7 2600k @ stock Sentinel SGM-6001 (high DPI mouse) All you have to do to replicate this bug is launch Firefox and go to any Youtube video and start moving your cursor around, which causes terrible lag. I've wanted to switch to Firefox for years but but this bug has stopped me. This is a bug a lot of people have had trouble with but sadly not much attention has been driven to it and people have resorted to (like me) just using another browser. The users in the bug report above say its just Flash, which in some cases it may be but in my case its HTML 5 videos that are having issues... CPU Usage seems to sky rocket when moving your cursor if thats any help. Heres a video demonstrating the issue: https://vid.me/R4O2 I have tried disabling and enabling hardware acceleration both to no avail, along I've tried using a different mouse and it works completely fine. Ive also tried Waterfox and that has the same issue. Does anyone have any updates on the progress of this bug? Its really sad that not enough attention has been bought to it! I really want to switch to Firefox but its simply unusable right now.

All Replies (1)

guigs
guigs
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You mentioned that when you use a different mouse it works completely fine, is the mouse driver updated?

I also understand that there is a lag here, and I would be happy to provide the information needed to file a performance issue in bugzilla:

Currently the Nightly version of Firefox update more often then the stable releases of Firefox. It is on a rapid release cycle.

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