the most simple functions. You can disable the Unresponsive Script
Type about:config (just like one word, no spaces) in the
address bar. Hit return.
Confirm that you'll be careful.
Scroll down to dom.max_script_run_time (or type it in the
filter), double click it and set the value to 0.
This way, the browser will execute the script, even if it takes
a bit longer, without nagging you with warnings. Keep in mind that
your PowerBook is quite a bit slower than an Intel Mac, so we PPC
users will see this warning more often than intended.
You could also disable JS for Google (and other heavy sites)
with the NoScript or YesScript extension, which is what I do.