To post a list of your extensions, you can use this method:

1. Select and copy the following block of code (click the yellow area to select it):

   var support_data = {};
   window.addEventListener("WebChannelMessageToContent", function (e) {
   	if (e.detail.id === "remote-troubleshooting") {
   		data = e.detail.message;
   		if (data === undefined) {
   			console.log("FAILED retrieving support data -- make sure you are doing this in your support thread");
   			window.clearInterval(retryint);
   		} 
   		else support_data = data;
   	}
   });
   var evt = new window.CustomEvent("WebChannelMessageToChrome", {
   	detail: {id: "remote-troubleshooting", message: {command: "request"}}
   });
   window.dispatchEvent(evt);
   function getExtensions(tgtTextarea){
   	var extarray = window.support_data.extensions;
   	if (extarray === undefined) return;
   	window.clearInterval(retryint);
   	tgtTextarea.textContent += "\n'''Extensions in " + window.support_data.application.name + " " + window.support_data.application.version  + "'''\n";
   	extarray.forEach( function (extobj){
   		if(extobj.isActive) tgtTextarea.textContent += "\n* '''" + extobj.name + "''' (" + extobj.version + ")<br>" + "ID: " + extobj.id + "\n";
   		else tgtTextarea.textContent += "\n* " + extobj.name + " (" + extobj.version + ") - DISABLED<br>" + "ID: " + extobj.id + "\n";
   	});
   }
   var retryint = window.setInterval(function(){getExtensions(document.getElementById("id_content"))}, 1000);

2. Back in the tab with your support question, open Firefox's Web Console below the reply box using either:
   • menu > Developer > Web Console
   • Windows and Linux: Ctrl+Shift+k
   • Mac: Cmd+alt+k
3. Paste the code on the bottom line next to the caret (>>) and press Enter to run it. In a second or two your extensions should be listed in the reply box and you can close the Web Console.

Note: This script does not work outside of the context of a support thread. Last updated 3/21/2016.