The Google Trend is just cool. It shows the trend of the keyword in Google. And what's more is that it lets us to compare the trends of multiple keywords, somehow like Google Fight (but better). For example, a search of "internet explorer" vs "firefox" clearly shows us who the winner is:
A more search showing more browsers (notice that Google Trend only shows a maximum of 5 keywords.). Basically Safari, Opera and Konqueror are so low and close, making them inseparable from each other. In order to see more clearly what happens on the ground level, we have to keep just these 3 browsers.
More interesting comparisons: