firefox addons panel hide

Question

My addon opens a popup panel (popup.html).

When the user changes the current tab to different tab, the popup panel is hidden

When the tab is selected second time I need it to still available contentURL (popup.html) but I did find the way to do it.

Answer 1

You can create your panel like this:

<panel 
    id="yourPanel" 
    type="arrow"    
    noautohide="true"
    level="parent">      
</panel>

Explanation:

level = "parent" means the panel is shown just above the window the panel is in, but behind other windows above it.

noautohide = "true" means the panel will only be closed when the hidePopup method is called.

With these two combined, you get the behavior you're looking for.

For reference see mdn panel page