After Mozilla announced the extended support release (ESR) of Firefox, Cameron Kaiser stated that starting with version 10 of TenFourFox, stable releases of TenFourFox will be based on Firefox ESR to reduce maintenance burden. Version 5.0 switched to the current Mozilla rapid release framework, based on Firefox 5 and including additional AltiVec scaling and color features, and was released on June 16, 2011. The finalized first release version, 4.0s, incorporated a security update and a fix for JavaScript performance, and was released on March 24, 2011. More about that when the beta is out, which I'm hoping to do by the middle-end of July. Sleeping the Power Mac pauses everything, so the cruft in memory that garbage collection has to clean out doesn't pile up while you're not using the machine, and everything comes back up in sync. (This is why running TenFourFox from a 'fresh' start is much faster than when it's been chugging away for awhile.) It's possible to 'pause' TenFourFox to a certain extent but the browser really isn't tested this way and may not behave properly when this is done. If you have lots of tabs open and those tabs are refreshing their data or otherwise running active content, then this contributes to a greater need for garbage collection and this will slow down your user experience as this overhead accumulates. Not only does by reducing heat (another plus in summer) as well as saving a substantial amount of energy (around 20W sleeping versus 200-250W running), but sleeping also can speed up TenFourFox.
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