You want fancy login screens? Login Designer has you covered.
A very interesting idea but don’t expect to make money from mining login attempts, yet.
Simple Monero Miner is definitely a plug-and-play solution for mining XMR in the browser. Highly recommended!
The SpareChange plugin has potential but its missing a lot of functionality currently to be practically useful.
Comes with heaps of options but it seems like current implementation is a bit buggy.