I recently bought a cheap&small office laptop with intention of taking it with me and completing assignments in public places. Problem is, it chokes up and dies when running more than eight tabs on firefox. I also tried k-meleon, it has great performance but the UI is ancient and many websites that I need dont support it.
opera lite/mini isn’t too bad. on android there’s a great app called hermit that makes mini-apps of webpages or groups, even other apps. it worked super well on my super cheap free phone. you’d need to do an android emulator for the pc so i don’t know how well it may work there