Project site - This here is the code section.

• Save the extension somewhere.
• Rename it to the extension .zip.
• Unzip it in a directory.
• Go into the directory chrome.
• Unzip antiparanoia.jar
• in content\antiparanoia\, look at the file antiparanoiaOverlay.js

... after doing something with the code ...

• Update the changes into the zip chrome/antiparanoia.jar (drag’n’drop should be enough)
• Update the changes into the zip chrome/anti-paranoia-0.3-fx.xpi.zip (drag’n’drop should be enough)
• Rename it to the extension .xpi
• Drag it into Firefox.

This is quite the Hello world-extension

function dontPanic() {
	var icon = "chrome://antiparanoia/skin/antiparanoiam.png";
	var url = null;
	var title = "Don't Panic";
	var texts = new Array(6);
	texts[0] = "Stay calm.";
	texts[1] = "Everything is good.";
	texts[2] = "No one is against you.";
	texts[3] = "The world is a good place.";
	texts[4] = "Nobody is watching you.";
	texts[5] = "Everything will be much better soon.";
        texts[6] = "It isn't your fault.";
	
	var text = texts[ Math.round(Math.random()*(texts.length-1)) ];
	
	var preferences = Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefService);
	var mybranch = preferences.getDefaultBranch("antiparanoia.");
	
	var timeMinimal = mybranch.getIntPref("minimaltime");
	var timeRandomMax = mybranch.getIntPref("randommax");
	
	if(timeMinimal<60000) timeMinimal = 60000;
	if(timeRandomMax<0) timeMinimal = 0;
	var timeoutTilNext = Math.round(Math.random()*timeRandomMax) + timeMinimal;
	
	var alerts = Components.classes["@mozilla.org/alerts-service;1"].getService(Components.interfaces.nsIAlertsService);
	alerts.showAlertNotification(icon, title, text, false, null, null);
	setTimeout("dontPanic()",timeoutTilNext);
}

• As you can see, It it is very easy to add texts: just add a texts[6] = ....
• You can also see, how the randomness is made.
• And you can see, how the popup is made (i saw this it at forecastfox).
• At the end of the function, it recalls itself.

Questions? Ideas?