Len wrote:
> I've been noticing this problem with Firefox for a few releases, but
> just did some diagnosis, to see what's happening, recently.
> Whe I download a file in Firefox, sometimes even the smallest file
> (maybe a FF extension .xpi file) will take 10 - 15 minutes to finish
> downloading. During that time, Firefox is not responding, doesn't
> refresh the window, and my overall CPU usage goes to 100%.
> I run DUMeter and watch bandwidth. I can see when the file actually
> gets downloaded from the server - DUMeter shows a reading equal to my
> DSL limit. When that happens, the file comes down fairly quickly -
> generally in a matter of seconds. But that's the last few seconds at
> the end of the afore mentioned 10 - 15 minutes.
> I used Process Explorer and Filemon, both free tools from SysInternals,
> to see if I can spot what's going on. During the 10 minutes of CPU
> wastage, Process Explorer reports a thread at start address
> "firefox.exe!jpeg_fdct_islow+0x247ac" as the CPU hog. I run Filemon
> while this is happening, and listing what file Firefox is accessing, it
> shows it apparently cycling thru my entire hard drive, seemingly
> randomly, simply opening folders and querying file information.
> I've run numerous malware detection tools, and detected no unknown
> software on my system. Believe me, I've looked carefully. That would
> be an easy solution.
> I'm currently running Firefox V1.5.0.2, though I started observing this
> before V1.5. I currently run the following extensions (although most
> of these have also been upgraded a few times):
> Adblock V0.5.3.042
> Bookmarks Synchronizer 3 V1.0.2
> Download Manager Tweak V0.7.1
> NoScript V1.1.3.9
> Sage V1.3.6
> Tabbrowser Preferences V1.2.8.8
> This is one of my 4 computers. It runs Windows XP Pro SP2, with all
> security patches. I use Firefox 95% of the time, and with these
> extensions, on all 4, including one other running XP Pro SP2.
> Has anybody here observed anything like this?
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