Is it correct to dispose of my bedridden, sick mother’s furniture by donating it or giving it to my younger brother before her death, given that I am her general agent?

It is not permissible to dispose of or give away the mother's furniture or clothes as charity without her permission if she is of sound mind and mature. If she loses her sanity due to old age, it is absolutely not permissible to dispose of her property, even if you are her guardian, because that is considered an act harmful to the property. In the case of her death-threatening illness, she is not allowed to donate or give away as charity more than one-third of her property. As for a non-death-threatening illness, she is not prevented from disposing of her property in any way.