Surprising Memory Use of Browsers

Hmmm... Really I didnt know Firefox was that efficient with its memory.

Obviously by this picture which shows the memory use of each browser, Firefox is the clear winner for Total memory use. Opera is a close second with chrome far behind both of those and Safari WAY IN THE BACK. (you will notice there is no IE... that is because I only have IE6 on this computer [we abandoned it and never looked back])(based off of newly opened Facebook, Gmail, Youtube, and Wikipedia articles: HDMI, Dolby TrueHD, and DTS-HD Master Audio tabs)(no extentions)
Firefox 4.0B12 -                   310704KB
Opera 11.01.1190 -             329976KB
Chrome 11.0.686.3 -            449647KB
Safari 5 (7533.16) -              957224KB     Who was the wise guy behind that

in the raw data it shows Firefox uses 3 times less memory than Safari.

  Ooh lets look at the disk space it uses
according to windows(because I'm lazy)(estimates the program folders size)
Opera 11.01: 28.17 MB(the smallest-as advertised)
Firefox 4B12(much larger than other betas): 31.38 MB(possibly as much as 55 MB with history and addons)
Safari 5: 41.15 MB
Google Chrome Dev 11.0.686.3 : 161.00 MB(as always from the beginning the largest)

as for the other stats its hard to measure the CPU Tax of each browser and as for speed It depends on what you are testing...

but as for Resource management it looks like Firefox, opera, and chrome are excellent at it. and each of those browsers have their strength.
Chrome looks like it might be the fastest and its fairly extensible because of how many there are at the moment but lacks in extensibility because its extentions cannot have some capabilities available with extentions in other browsers.

Firefox is decent with its speed, great with resources and SUPER EXTENSIBLE having the biggest collection of addons with add-ons that are not possible on most browsers(i speaks the truth), and though its definitely not the fastest, it's not slow.

Opera is definitely the smallest, its speed is undeniable, its javascript engine is rocking, and it has amazing features built in, but it lacks in available extensions(at the moment).

and Safari is well... Slow. Really Slow. By far the slowest out of the 5 major browsers. it has a unique UI but basically no extentions and is a big memory hog. the only thing it has going for it is its preinstalled on Apple Products which im sure as the population becomes more Tech savvy that will continue to matter less and less.

All new browsers have converged on the same basic UI and great security(except for safari) so those are not even issues.

so really it's a matter of preference of do you like Extensibility, Speed, Features, or a combination of those.