If you have to resort to using Ibrowse because of your limited CPU resources, then you clearly have a much too weak computer. Complex web pages and HD media content is everywhere now, that kind of stuff is part of the common daily routine for desktop systems today, and even my $129 Efika MX handles this just fine. There are no shortcuts, you need a certain minimum level of performance in desktop today, using ancient and obsolete applications like Ibrowse certainly isn't the answer...
And that is exactly the problem. There is no affordable os4.x hardware that has anywhere near enough power.
I dont know how rc1 is of timberwolf, but the earlier was at least completely unusable on my sam system.
And there is no way I will ever afford the x1000 either.
Even though Ibrowse is ancient, it is at least more useable than timberwolf on such a low end system.
As a main browser I use mui-owb/odyssey though.