It seems to me that in the last few days the appearance of some websites has change. When reading nytimes.com or other sites, the webpage does not take up the full width of the screen. There are vertical spaces on both sides. Therefore, the webpage and the text on it looks smaller than it did before and it is hard to read. This change may have happened shortly after I changed to Firefox4 from an earlier version. Is there a way I can change the settings to resume the previous appearance of the webpages taking up the full width of my screen? Thanks!