Hey!! Thank you for your comment!!
First of all, I don´t know why Firefox didn't like the game, I don´t use it so I didn´t test there, sorry about that!!
Secondly, the lantern works the way I intended, you just have 4 seconds to use it, even if you turn it off (I thought it would be more challenging). But almost finishing the game I realized that if you press all the time the E button, you will encourage no trouble(because it will be always ON). I didn't have the time to think of another idea and fix it so I just leave it like that.
Thanks a lot!!
Brothers videogame.