User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:12.0) Gecko/20100101 Firefox/12.0 Build ID: 20120420145725 Steps to reproduce: With Thai keyboard layout, press a key that types a Thai character and triggers the keyup->keypress->keydown DOM event. - Go to http://unixpapa.com/js/testkey.html - Switch to Thai keyboard layout. - Press a key, for example "ก", which corresponds to the "D" key. Actual results: The keyCode turns out to be 0. Firefox on Mac reports: keydown keyCode=0 which=0 charCode=0 keypress keyCode=0 which=3585 charCode=3585 keyup keyCode=0 which=0 charCode=0 Expected results: The physical key that is being pressed should be reported. Here is the result on Chrome for Mac: keydown keyCode=68 (D) which=68 (D) charCode=0 keypress keyCode=3585 which=3585 charCode=3585 keyup keyCode=68 (D) which=68 (D) charCode=0 Note that Firefox on Windows doesn't have this issue and should have the same output.

should be fixed by bug 677252. feel free to reopen this bug if you can see this bug on tomorrow build.

I meant 5/18's build.

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0 I think I see a similar bug here. My keyboard is not Thai, it's Italian. When I type Italian characters, like àèéìòù, I get keyCode=0. Steps to reproduce: - Switch to Italian layout (mine is an extended keyboard, with shord left shift key) - Go to http://unixpapa.com/js/testkey.html - press a key with grave accent (for example, any of 3 keys between L and ENTER) Actual result: keydown keyCode=0 which=0 charCode=0 keypress keyCode=0 which=249 charCode=249 keyup keyCode=0 which=0 charCode=0 Expected result (copied from execution on Chrome): keydown keyCode=191 which=191 charCode=0 keypress keyCode=249 which=249 charCode=249 keyup keyCode=191 which=191 charCode=0 Using Windows7 64-bit.