I use firefox on android and immediately switch to reader view. It works wonderfully. The content takes up the entire screen, text always stays where you want

I use firefox on android and immediately switch to reader view. It works wonderfully. The content takes up the entire screen, text always stays where you want it, scrolling response is instant and my phone stays cool while reading it. Plus you have dark and light themes for browsing. Unfortunately, Firefox for iOS is built on Webkit, so there are no plugins for it, so this approach doesn't work on my iPad.