Question

Have a pluggin that is installed as part of an app, the pluggin needs to use different overlays depending on what version of FF is being used as it modifies the interface.

I found https://developer.mozilla.org/en/Bundles to specify different files but this only seems to cover which OS/bitness.

Is there a way to specify that an overlay only applies to particular versions of the UI?

ie. This works for FF3.6 and earlier but breaks FF4

<overlay id="myOverlay"
    xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

    <dialog id="commonDialog" onload="commonDialogOnLoad(); myLoad();"
        ondialogaccept="myAccept(); return commonDialogOnAccept();">

This is aimed at the Domain Login and the FTP Login dialogs, so an idea on making it more specific could help too.

Answer 1

I haven’t done this myself, but I think you can accomplish this effect using flags in your chrome.manifest file. See https://developer.mozilla.org/en/Chrome_Registration#Manifest_flags