On macOS, I've seen a few attempts like this: https://www.reddit.com/r/macapps/comments/12n7162/part_3_final_browser_energy_efficiency_benchmarks/ https://www.

On macOS, I've seen a few attempts like this: https://www.reddit.com/r/macapps/comments/12n7162/part_3_final_browser_energy_efficiency_benchmarks/ https://www.reddit.com/r/macapps/comments/12n7162/part_3_fin... but it ends up being very user-workload-specific. Every webpage is different - e.x. Pintrest may be more battery efficient on Safari, but if I never go there, ¯\_(ツ)_/¯. For my workflow, Safari and Chrome seem about the same, Firefox seems to land me 10-20% lower on battery after 4 hours or so of use. Unfortunately, I don't have any more scientific data than that.