My Firefox has slowed down to a crawl for no apparent reason. It starts out okay but gradually slows until it's inoperable. Nothing changed. Everything I can find to do has been checked. What happened?

Oh, good, space. I was using ver 8.x; it was working fine. I left for a couple of hours. When I returned it had slowed to a crawl and was unusable. I'd been getting nagged to update, so I did that first. Cleared cache, cookies, history. Disabled hardware acceleration. Restarted Win (XP SP3), ran a virus check, etc., all the usual stuff. Don't have a proxy. The behavior looks like very, very bad lags. Often the page refreshes itself over and over as it loads. This happens on EVERY page. Chrome and Safari are working fine. I would love my Firefox back so any help appreciated.

Hi mpblonestarlady,
Have you looked at our [https://support.mozilla.org/en-US/kb/firefox-slow-or-takes-too-long-start performance troubleshooting section]? There is a lot of good information in there that should help.
Hopefully this helps!

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