Multiple login in firefox with orkut,gmail,yahoo !!!!!

Login with multiple ids at the same time in orkut , gmail , yahoo ....To perform this trick u need firefox mozilla browser...Perform the following steps..Step 1:Open system properties(by right clicking my computer), choose tab advanced, click to environment variables button. In system variables section, click new. Type this information to each textbox.variable name: moz_no_remote (should be all