what wrong with firefox

hi, i just finish the javascript 9

and it take me a good couple of time …. cause i don't know why when i try to inject my code for changing the time variable … it just freeze it ….. and the only way to unfreeze the timer is to restart the browser ?

finally iv done it with googlecrome an it worked perfectly.

so .. humm i guess it some option in Firefox …. well my java-script is activated ….. and it don't work in a console eater.

ty for respond :D

The built in web console also works, and is much nicer to work with than typing Javascript in the address bar.

ty a lot for all those clear respond :)