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I am using the 64-bit alternative of Firefox - Waterfox. I have been facing this issue even when I was using Firefox. What happens is after I have played at least one video or have kept it open for a long time, the browser and consequently all windows of applications start acting sluggish. By sluggish, I mean the following behavior:

  • Laggy animations of tabs / progress bars etc.
  • Delay while loading images
  • Delay in text fields while moving around the cursor

The only way I am able to restore the smooth behavior is by a restart.

Any idea what's going on?

share|improve this question
Sounds like a memory leak or an active spawned task not properly closed by the browser. Did you take a look at the task manger or process list? – lrosa Mar 25 '12 at 18:28
@Irosa: Memory usage of firefox.exe is normal. Could you please explain as to how do I trace this leak? Also, why is it affecting other applications? – Vrushank Mar 26 '12 at 3:33
There are some shell tools like top; you can probably use some GUI tool to trace memory and CPU usage. Other tasks can be used to display video or other type of content. If the task hangs or Firefox is not able to terminate it properly, your system could slow down. – lrosa Mar 26 '12 at 4:29
OK, will try that. Also, I have disabled the "plugin-container.exe" in FF. Is that probably causing the problem? – Vrushank Mar 26 '12 at 5:43

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