Not really. I've never really gotten the hang of sleeping in. I wake up at the same time weekday or weekend, only difference is I might read in bed for a bit before actually getting up if I have nothing to do that morning.
Go to bed reasonably early. The thing to watch/code/play will be there tomorrow. If you want to go out at night, do it on weekends. As for waking up, I'm used to it now (and my alarm clock app makes me solve a math problem to shut up :)) but long ago when I had trouble waking up, I'd put the alarm clock on a table on the other side of the room so I'd have to get up and walk over to shut it off. By the time that was done, blood is flowing and I'm awake.
Kiwix isn't a web browser exactly and doesn't download web pages the way your browser saves them. It uses a specialized file format, and it can be used to back up an entire site. For instance the kiwix library has an offline copy of wikipedia (no images), but it weighs in at more than 100GB last I looked.
Valentina. Not very hot, but I like it and use it like ketchup.