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Detect tabbox tab change in XUL...

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Change Javascript in a Firefox extension overlay...

Dispatch CustomEvent() to prefwindow - Firefox addon...

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Changing Firefox extension icon programmatically...

Firefox toolbarbutton initialization event...

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XUL implicit elements...

To anonymous element add pseudo element and cursor style and event listeners...

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nsIXULWindow vs nsIDOMWindow...

Get notified when workstation gets locked...

Handling and aborting downloads from Firefox extension...

How to send message from XUL to embedded WebExtension...

How do I migrate a legacy XPCOM extension to WebExtensions?...

What is the CSS for Firefox's URL suggestion popup?...

Is selenium IDE an XUL add-on in Firefox?...

Xulrunner runs but does nothing...

Dynamically show data in the popup which is determined in onpopupshowing event handler...

Why are CSS declarations for about:addons placed in userContent and not userChrome, given that the n...

Mozilla Firefox extension developing. 577 < 100. How is this possible?...

How to insert image in status bar?...

getElementsByTagName ("div").length returns zero for any webpage...