How old is the computer? How much RAM? Video card? And how many windows of what are you looking at when you notice it bogging down? More than likely its the content rather than just the plugins. They can be total hogs, depending on what it is. I like Chrome but it can be a crazy resource hog too, it opens every tab as a separate browser so if you had a few open it can bog down older computers.

If you're running HD video or something it could easily be your computer's specs and being unable to process the data quickly enough rather than just the plugin--disabling the plugin can be preventing it from streaming and processing the data but is not necessarily the cause of the slowdown.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth