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Firefox will beach ball for 15 seconds after resuming laptop from sleep.

That really doesn’t sound like normal behaviour? Have you tried the ‘Reset Firefox’ button on about:support? More info at https://support.mozilla.org/en-US/kb/reset-preferences-fix-p...

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Reset is not really an option when you have your chosen extensions installed and customized.

Considering extensions are the #2 reason (behind Flash) that Firefox crashes/beachballs, perhaps one would be wise to audit the (presumably) tons of extensions they have installed locally, to see if they conflict with other extensions?

Actually a handful of essential extensions (in my case those essential one for web dev) are enough to bring it down on my under-powered laptop.

If what you're saying is true, then your handful of extensions are conflicting with each other. disable one of the handful, and see if the crashes disappear. if not, disable another one.

currently using a netbook with an Atom N570. I appreciate under-powered computing. Firefox runs fine here with 5 extensions (two of which are for web development). 17 tabs are using 214.52 MB of memory. haven't had a crash or hang in a long time.

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