Sure, but only in the sense that for many casual computer users, it's the default and therefore browser of choice. As for comparisons re: stability and usabilit

Sure, but only in the sense that for many casual computer users, it's the default and therefore browser of choice. As for comparisons re: stability and usability it's night and day. Safari is a fine browser for OS X machines, and I've found it to be way more battery-friendly than Chrome on my Macbook. It has a decent enough built-in pop-up blocker and is supported by a few big adblocker plugins. I'd say the comparision is more or less unfounded, except on the grounds that it's the default browser for many users, hence its market share.