If an app is too far out of the question for now, develop an extension for mobile chrome and firefox! The official Firefox mobile app can already run this extension with a slightly jacked up aspect ratio, but I’d love for it to be official! Run desktop mode to force add the extension, and copy the address into settings as your new tab page.
Firefox Beta, Preview, an Nightly DO NOT support this functionality however since they have different base code for the app and extensions. However, they are introducing more official extensions so I reccomend developing for the future and using those if you decide to work on a mobile version of the extension! Thanks!