The picture says it all. Just browsing reading news and forums on both browsers.
Hi,
This forum is not the right place to ask troubleshooting questions. If you have a problem with Firefox that you need help with, please ask your question on the Firefox support forum https://support.mozilla.org/questions/new/mobile/form. You can also ask for help on our Matrix Chat .
No issue. If you wish to save battery then ask website owners do not use javascript everywhere and everyfor. You can disable Javascript. Browser will work faster and battery consuming will be decreased.
About battery consuming I recommend to visit a websites about you phone and OS.