I just releases version 0.2 of my tooltip.js library. The new version follows the mouse correctly on Firefox (thanks to Graham TerMarsch) and can apply a constant delta when displaying the tooltip. This can be useful if your CSS rules include absolute positioning that can result in a constant offset. var my_tooltip = new Tooltip('id_of_trigger_element', 'id_of_tooltip_to_show_element', { delta_x:
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