just sharing another fix i made for myself a while ago. i always found the dms windows too small for my screen so i made it a more comfortable size.
for reference my screen resolution is 1920*1080 and the new dm size is 360*640. if this is too big (or small) for your screen feel free to edit the code and adjust it to your liking :)
once again all you need to do is install the Stylishextension (chrome,baidu,firefox, and opera ) and install the code from here.