Created attachment 335721 [details] testcase Hi, when dynamically setting -moz-user-input to disabled (on a html input element), sometimes, selection won't be colored in blue anymore. this happens when I select some text in input; then move focus out of input, then set -moz-user-input to disabled. See my testcase. For some reason, bug does not appear when loading in background. Please load in current tab to trigger the bug. Also, when loading either in foreground or background, if I select first input, then select second input, first input is not unselected.