https://bugzilla.mozilla.org/show_bug.cgi?id=805697#c4 data:text/html,<input readonly value="value">body text If you put the document in caret browsing mode (F7), and click on "body text" (caret is displayed - ok), and then click on "value" => caret does not move, so it looks like the <input> isn't focused at all, although it is. If you type Shift+LEFT to select some <input> text then the caret is erased.