Chrome[1] and Firefox[?] and probably others on Linux do not have this behavior enabled by default. [1] https://code.google.com/p/chromium/issues/detail?id=144

Chrome[1] and Firefox[?] and probably others on Linux do not have this behavior enabled by default. [1] https://code.google.com/p/chromium/issues/detail?id=144832 https://code.google.com/p/chromium/issues/detail?id=144832