Firefox adds-on which enables us to zoom easily

Glazoom is a firefox adds-on which enables us to zoom the content in the web pages convinently.Before using it,I must go to the menubar,select view and then zoom in or by clicking "Ctrl++"to zoom in.It will be better if the fonts are larger especially considering your sight.I once used Safari and Opera,they both have a convinent way to zoom in.And Glazoom 's feature is especially similar to that of Opera.So I think it is a usefil adds-on.