tokens: I 'm not sure if that 's GWT 's fault - every browser has some core CSS rules defining the default look , if no additional CSS styles are applied ( like that annoying blue border on all images in FF ) , so just make sure you set explicitly your font size , etc to nullify these differences .
ner_tags: O O O O O O O B-Application O O O O B-Application O O O B-Language O O O O O O O O O B-Language O O O O O O O O B-User_Interface_Element O O B-User_Interface_Element O B-Application O O O O O O O O O O O O O O O O O O O