Repair Custom Buttons after save in Nightly with javascript.options.xml.chrome = false http://custombuttons.sf.net/forum/viewtopic.php?p=2905#p2905

cb_repair_broken_overlay.js

// http://custombuttons.sf.net/forum/viewtopic.php?p=2905#p2905
// (c) Infocatcher 2012
// version 0.1.0 - 2012-12-20

// Repair Custom Buttons after save in Nightly with javascript.options.xml.chrome = false
// Use at your own risk!
// Backup your %profile%/custombuttons directory first!

Components.utils.import("resource://gre/modules/NetUtil.jsm");
Components.utils.import("resource://gre/modules/FileUtils.jsm");

var cbDir = Components.classes["@mozilla.org/file/directory_service;1"]
	.getService(Components.interfaces.nsIProperties)
	.get("ProfD", Components.interfaces.nsIFile);
cbDir.append("custombuttons");
var entries = cbDir.directoryEntries;
while(entries.hasMoreElements()) {
	var entry = entries.getNext().QueryInterface(Components.interfaces.nsIFile);
	if(entry.isFile() && /^\w*buttonsoverlay\.xul$/.test(entry.leafName))
		repairFile(entry);
}
function repairFile(file) {
	NetUtil.asyncFetch(file, function(istream, status) {
		if(!Components.isSuccessCode(status)) {
			alert("NetUtil.asyncFetch() failed: " + getErrorName(status));
			return;
		}
		try {
			var data = NetUtil.readInputStreamToString(
				istream,
				istream.available(),
				{ charset: "UTF-8", replacement: "\ufffd" }
			);
		}
		catch(e) {
			alert("NetUtil.readInputStreamToString() failed:\n" + e + "\nEmpty file?");
			return;
		}
		var repaired = repairXML(data);
		if(repaired == data)
			return;
		var bak = file.clone(), i = -1;
		do
			bak.leafName = file.leafName + ".repair" + (++i || "") + ".bak";
		while(bak.exists());
		file.copyTo(null, bak.leafName);

		var ostream = FileUtils.openSafeFileOutputStream(file);
		var suc = Components.classes["@mozilla.org/intl/scriptableunicodeconverter"]
			.createInstance(Components.interfaces.nsIScriptableUnicodeConverter);
		suc.charset = "UTF-8";
		istream = suc.convertToInputStream(repaired);
		NetUtil.asyncCopy(istream, ostream, (function(status) {
			if(!Components.isSuccessCode(status)) {
				alert("NetUtil.asyncCopy() failed: " + getErrorName(status));
				return;
			}
			alert("Repaired: " + file.leafName + "\nBackup: " + bak.leafName);
		}));
	});
}
function repairXML(data) {
	return data
		.replace(/ xmlns=""/g, "")
		.replace(/="[^"]+"/g, function(s) {
			return s.replace(/[\x00-\x19]/g, function(chr) {
				return "&#x" + chr.charCodeAt(0).toString(16).toUpperCase() + ";";
			});
		});
}
function getErrorName(code) {
	var cr = Components.results;
	for(var errName in cr)
		if(cr[errName] == code)
			return errName;
	return code;
}