<!DOCTYPE html> <html> <head> <style> span { color: transparent; /* workaround for bug 617524 */ outline: 1px solid green; } </style> </head> <body> <input> <input readonly><span>hide me</span> <input type=password> <input type=password readonly><span>hide me</span> <input type=email> <input type=email readonly><span>hide me</span> <textarea></textarea> <textarea readonly></textarea><span>hide me</span> </body> </html>