I would love to have a good browser so I could actually use it as my main machine. My X5040 cannot play any youtube videos or like I said go on any graphic intense sites like FB, Rumble, etc. Either I am doing something wrong but it just taxes the processor. I recently upgraded my X5040 to an X560 radeon. that seemed to help playing video files but my CPU just gets pegged most of the time.
Have you tried MorphOS with the Wayfarer browser?