TenFourFox is a great piece of software, but I get annoyed when I see the CPU usage jump to 100% literally doing something as simple as moving the cursor over a webpage, and page loads are quite sluggish as well, again with 100% CPU usage. This is on a Power Mac G4 Cube upgraded to 1.8 GHz using one of the rare upgrade cards (Sonnet Encore ST G4). Of course I don't expect this to perform like a brand new Intel Mac. Still though, TenFourFox (and Firefox in general) is slow on low-end hardware, and I wonder if there are any modern or still supported alternatives to TenFourFox on Mac OS X Tiger (10.4.11). Yes I could update this Mac to Leopard and run Leopard Webkit, but would rather stay on Tiger because it runs decently, looks nice, and also fits better with the older software installed (as well as being able to run the newer PowerPC software such as iWork '09 and Adobe CS4). I'd also welcome advice on how to speed up TenFourFox itself so it doesn't use 100% simply hovering over a webpage!