There is a script that kinda do this, no thumbnails, no sorting or updates, just a list with hyperlink titles. Not ideal, but helps.
https://greasyfork.org/en/scripts/412392-mangadex-plus
@AbyssalMonkey
Despite logging in being a simple task, I don't strongly disagree in let it always available. But I think they should put Data saver ON by default for a week and compare the results