Configuring Web-Browsers to use more RAM

While constantly flying around the Earth I hear my Hard Drive working double time, the head is buzzing, even if it’s not transferring a ton of data. I then look at how much RAM the Web-Browser is using and it’s in the neighborhood 500 MegaBytes, although I have 8 GigaBytes of RAM. I’m thinking that even if I increase my RAM to 16, 32, or 64 GigaBytes that the Web-Browser still won’t take advantage of it.

Anyone know how to configure Opera or Chrome to use more RAM instead of the Hard Drive for storage? This is an awesome program I’d like use for hours, but I’m concerned about the Hard Drive usage.