that's indeed not bad extension with beautiful ui. but there's a few problems that sometimes made me mad. i been facing with a problem that there pop up button appears for a sec and disappear so that i cannot click on it, or it does not appear at all, on some sites it works very bad and does not appear at all, for example on youtube as i remember i've faced with this problem frequently enough. the next one problem is that sometimes this button appears on the right upper corner and when i'm checking images on wikipedia, i cannot click on close button, because mate translate button stays upper to close image on z-index dimension.