MacPro 2.5 GHx, Intel Core 2 Duo, running snow leopard 10.6.7 --Firefox asked me to upgrade, that's when troubles began -- when I open FX, get my default page, then it freezes, disallows any page changes, links die, no page scrolling.

Please, I need help! Working on a MacPro 2.5 GHx, Intel Core 2 Duo, running snow leopard 10.6.7 --
Last week, Firefox asked me to upgrade, that’s when my troubles began -- Now when open Firefox, I get my default page, and then it freezes, disallows any page changes, the links die, no page scrolling --
The only unusual aspect to my previous Firefox configuration, was that I installed a NO SCRIPT thing to get past the New York Times paywall — and I don’t understand how to un-install that, assuming that’s the issue --
Have downloaded and re-installed Firefox, don’t think this has helped in any way, HELP please?!? Thanks, george.

That would at least partially explain it.
These MacBook Pros drew more power than the power brick could readily supply, and so would only run at top speed when the power brick was supplemented by the battery.
Though the applicable tech note has been removed, it stated:
"If the battery is removed from a MacBook or MacBook Pro, the computer will automatically reduce the processor speed. This prevents the computer from shutting down if it demands more power than the A/C adapter alone can provide."

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