Tweaks for the ultimate in performance

There are several settings and options that can make Firefox run as a much faster browser. You should test these techniques before you roll them out to, say, a thousand workstations in your company.

Speeding up the maximizing of Firefox By default, when you minimize Firefox, it gives back to Windows most of the RAM the browser was using. It sometimes can take several seconds for the browser window to become fully loaded when you restore the window to its original size. This is one of those "version 1.0" things, in my opinion, that will become more streamlined in future bump revs of the program.

Fortunately, there's a hidden setting that can accomplish the restoration of Firefox windows much more quickly:

Step 1. Use about:config to create a new, Boolean value. Type or paste the following string into the dialog box that appears:

config.trim_on_minimize

Step 2. Click OK to close the dialog box. Change the value from "true" to "false" and restart Firefox.

This doesn't piggishly retain all of the RAM that Firefox has claimed. If Windows needs more RAM to devote to another application, Windows can take it. What the setting does is prevent Firefox from giving up most of its RAM until the memory is actually required elsewhere.

Setting this item to "false" may noticeably slow down other applications while Firefox is minimized, if your PC has less than 256 MB of RAM. If so, change the setting back to "true."

There's an extremely long discussion about the development of this trick, going back to March 2004 (and continuing up through today), in Bugzilla bug report #76831. If you're determined to delve into this, I'd recommend starting with comment 329.