I’m not sure about the older Raspberry Pis, since I didn’t try them out. If I were you, I would make sure that the distro is empty and running nothing extra. Once I confirmed this, I would try a browser like Iceweasel and see if it gets better.
If you are ready to do a fresh new OS installation then I would recommend that you get DietPi as described above. If you don’t choose to install any software in the beginning, it is definitely extremely lightweight, even more lightweight than Raspbian Lite. The only thing you need then is an LXDE or LXQt desktop environment + Iceweasel or a similar browser. This should improve the performance.
1 Like