Android Desktop mode - why is firefox ignoring android tables?

I would really like to use Firefox with all the syncing with all my devices but currently, the inability to turn on desktop mode permanently is just killing it. I didn’t buy a 12.7" tablet to use all the websites in mobile mode. (switching it on every time I open firefox isn’t a solution)

And it made me curious is there some reason behind it? Are there plans to fix it?