Firefox fans know that one of the best things about Mozilla's free browser is the huge range of add-ons available for it. Some do Big Important Things, like Internet security or personal time management. Others do Small Useful Things, such as MeasureIt, which measures it, when "it" is a Web page. When it's active, this free Firefox extension displays the width and height in pixels of any part of a Firefox page.
Like most Firefox add-ons, MeasureIt installed automatically, placing a small Ruler icon in the browser's lower left edge. The Firefox add-ons page let … Read more