Bookmarklets are cross platform across practically any browser and work in mobile devices too. Can't say the same for plugins. Plus it's easier for some develo

Bookmarklets are cross platform across practically any browser and work in mobile devices too. Can't say the same for plugins. Plus it's easier for some developers to knock out a bookmarklet than a plugin, especially when you can do much of the logic server side, and potentially hook into existing code there.