There are four possible solutions at least:
1) Install G4FanControl, which I would recommend for all G4 notebooks, and set the temperature values to 10 °C below the defaults: https://github.com/andreafabrizi/G4FanControl 2) Use Adblock, Inspector or any other tool to find the offending scripts that use up the CPU, block them and hope the site still works afterwards.
3) Use YesScript or NoScript to block JS (YesScript is nice because it's uncomplicated and lets you switch on JS if you need it very easily)
4) use Reader Mode to read stories (the little book icon in the URL bar)
I can also replicate this, but unfortunately I think this is a
limitation of our aging hardware. The page appears to run a "save
script" every two seconds, which is why switching away from that
tab reduces the CPU usage -- TenFourFox/Firefox diminishes the
priority of timers on background tabs to save cycles. The impact
seems to be CPU-related. On my MacBook Air the computer can keep
up, but the Quad G5 jumps to around 40% utilization and on my 1GHz
iMac G4 it does indeed run up as high as 90%. The code is embedded
in the HTML itself, so it is probably difficult to block only the
Please note I don't know if that's the only cause of what's
going on with that page. That said, two second timeouts over and
over just to save your reply seems a bit excessive even on a modern
PC, so I might ask the site owner to consider backing that down a
bit. You can point them to this thread if you like.
I agree with Chris that installing G4FanControl is a good idea
anyway. I had an iBook G4 cook itself to death too.