(async (id, sel) => { // Клики на Звёздочке, ToolTip: расположение закладки в Избранном, Недавняя папка
	var g = Cu.getGlobalForObject(Cu), stt = g[id]; // https://forum.mozilla-russia.org/viewtopic.php?pid=790890#p790890
	if (!stt) { var {obs, prefs} = Services, {bookmarks: bm, observers: pobs} = PlacesUtils;
		stt = g[id] = { bm, help_star: `\nПравый клик	Быстрая закладка\n
Клик дважды	Перевод сайта/выд.текста\nКолёсико	масштаб Текст / Всё\nКолёсико ±	Масштаб страницы`, // клики заданы в ucf_hookClicks.js
			pref: `ucf.${id}Guid`,
			events: ["bookmark-added"],
			async init() {
				this.handleEvent = e => this[e.type](e);
				if ((this.pbm = typeof PlacesBookmarkMoved == "function"))
					this.events.push("bookmark-moved");
				else
					this.QueryInterface = g.ChromeUtils.generateQI([Ci.nsINavBookmarkObserver]),
					bm.addObserver(this);
				pobs.addListener(this.events, this.added = events => {
					for(var e of events) e.isTagging || this[e.constructor.name](e);
				});
				obs.addObserver(this, "quit-application-granted");
				this.args = [b => this.bguids.add(b.parentGuid), {concurrent: true}];
				var guid = prefs.getStringPref(this.pref, "");
				if (!guid) try {var [guid] = await PlacesUtils.metadata.get(
					PlacesUIUtils.LAST_USED_FOLDERS_META_KEY, [])} catch {}
				this.guids.push(guid || await PlacesUIUtils.defaultParentGuid || bm.unfiledGuid);
			},
			observe() {
				this.pbm || bm.removeObserver(this);
				pobs.removeListener(this.events, this.added);
				obs.removeObserver(this, "quit-application-granted");
				prefs.setStringPref(this.pref, this.guids[0]);
				this.removePrefObs();
			},
			bguids: new g.Set(), guids: new g.Array(),
			skipTags: true,
			tt(win) {
				var list = win.InspectorUtils.getChildrenForNode(win.document.documentElement, true);
				return list.item(list.length - 1);
			},
			PlacesBookmarkAddition(e) {
				if (e.itemType == bm.TYPE_BOOKMARK && e.source == bm.SOURCES.DEFAULT)
					this.guids[0] = e.parentGuid;
			},
			PlacesBookmarkMoved(e) {
				e.parentGuid != e.oldParentGuid && this.PlacesBookmarkAddition(e);
			},
			onItemMoved(a, b, c, d, e, itemType, f, oldParentGuid, parentGuid, source) {
				this.PlacesBookmarkMoved({itemType, source, oldParentGuid, parentGuid});
			},
			fetch(win) {
				this.bguids.clear();
				return bm.fetch({url: win.gBrowser.currentURI.spec}, ...this.args);
			},
			find: obj => obj.name == "tooltiptext"
		};
		var ps = ["onBeginUpdateBatch", "onEndUpdateBatch", "onItemChanged", "onItemVisited"];
		var noop = () => {}; for(var p of ps) stt[p] = noop; stt.init();

		var func = id => this[id].mouseenter = async function(e) {
			var win = e.view, star = e.target, result = [], starred = star.hasAttribute("starred");
			starred && await this.fetch(win);

			for(var guid of (starred ? this.bguids : this.guids)) {
				var arr = [], num = 50;
				while(--num) {
					if (!star.matches(":hover")) return;
					var res = await this.bm.fetch(guid);
					if (!res) break;
					if ((guid = res.parentGuid) == this.bm.rootGuid) {
						arr.unshift(this.bm.getLocalizedTitle(res));
						break;
					}
					arr.unshift(res.title || "[Безымянная папка]");
				}
				arr.length && result.push(arr.join("\\"));
			}
			if (!star.matches(":hover")) return;
			var text = (await win.document.l10n.formatMessages([{ // стандартная подсказка
				id: star.getAttribute("data-l10n-id"),
				args: JSON.parse(star.getAttribute("data-l10n-args"))
			}]))[0].attributes.find(this.find).value, txt;

			if (result.length) {
				txt = result.join("\n");
				txt = starred ? `\n\n★ ${result.length > 1 ? "Данные закладки добавлены" : "Данная закладка добавлена"} в:\n${txt}` : "\n\n★ Недавно добавленная папка:\n" + txt; // text += this.help_star +'\n'+ txt;
			}
			win.document.tooltipNode == star ? this.tt(win).label = text + this.help_star + txt : star.tooltipText = text + this.help_star + txt;
		}
		var url = "data:;charset=utf-8," + encodeURIComponent(`(${func})("${id}")`);
		g.ChromeUtils.compileScript(url).then(ps => ps.executeInGlobal(g));
	}
	await delayedStartupPromise;
	var stars = Array.from(document.querySelectorAll(sel));
	for(var star of stars)
		star.addEventListener("mouseenter", stt);

	var destructor = () => {
		for(var star of stars)
			star.removeEventListener("mouseenter", stt);
	}
	var ucf = window.ucf_custom_script_win || window.ucf_custom_script_all_win;
	if (ucf)
		ucf[id] = {destructor}, ucf.unloadlisteners.push(id);
	else
		window.addEventListener("unload", destructor, {once: true});
})("ucfBookmarksStarFTooltipHelper", "#star-button, #star-button-box, #context-bookmarkpage");

(async (id, sel) => { // Клики на Звёздочке, ToolTip: расположение закладки в Избранном, Недавняя папка
	var g = Cu.getGlobalForObject(Cu), stt = g[id];
	if (!stt) {
		var {obs, prefs} = Services, pu = PlacesUtils, {bookmarks: bm, observers: pobs} = pu, stt = g[id] = {
			bm,
			help_star: [ // клики заданы в ucf_hookClicks.js
				"\nПравый клик	Быстрая закладка\n",

				"Клик дважды	Перевод сайта/выд.текста",
				"Колёсико	масштаб Текст / Всё",
				"Колёсико ±	Масштаб страницы\n"
			].join("\n"),
			pref: `ucf.${id}Guid`,
			async init() {
				var args = [
					["bookmark-added", "bookmark-moved"],
					events => {for(var e of events) e.isTagging || this[e.constructor.name](e);}
				];
				pobs.addListener(...args);
				pu.registerShutdownFunction(() => {
					pobs.removeListener(...args);
					prefs.setStringPref(this.pref, this.lastGuid);
				});
				this.args = [
					res => this.fetchRes.push(res),
					{concurrent: true, includePath: true}
				];
				var guid = prefs.getStringPref(this.pref, "");
				if (!guid) try {var [guid] = await PlacesUtils.metadata.get(
					PlacesUIUtils.LAST_USED_FOLDERS_META_KEY, [])} catch {}
				this.lastGuid = guid || await PlacesUIUtils.defaultParentGuid || bm.unfiledGuid;
			},
			PlacesBookmarkAddition(e) {
				if (e.itemType == bm.TYPE_BOOKMARK && e.source == bm.SOURCES.DEFAULT)
					this.lastGuid = e.parentGuid;
			},
			PlacesBookmarkMoved(e) {
				e.parentGuid != e.oldParentGuid && this.PlacesBookmarkAddition(e);
			},
			find: obj => obj.name == "tooltiptext",
			tt(win) {
				var list = win.InspectorUtils.getChildrenForNode(win.document.documentElement, true);
				return list.item(list.length - 1);
			},
			mapInfs(inf) {
				return inf.path.map(this.mapPaths).join("\\");
			},
			mapPaths: path => bm.getLocalizedTitle(path) || "[Безымянная папка]",
		};
		stt.init();

		var func = id => this[id].handleEvent = async function(e) {
			var win = e.view, star = e.target;
			var starred = win.BookmarkingUI._itemGuids.size;
			var arg = starred ? {url: win.gBrowser.currentURI.spec} : this.lastGuid;

			var arr = this.fetchRes = [];
			await this.bm.fetch(arg, ...this.args);

			if (!star.matches(":hover")) return;

			var len = arr.length;
			!starred && len && arr[0].path.push(arr[0]);

			var paths = len
				? arr.map(this.mapInfs, this).join("\n")
				: "<Folder Not Found>";

			var header = (await win.document.l10n.formatMessages([{ // стандартная подсказка
				id: star.getAttribute("data-l10n-id"),
				args: JSON.parse(star.getAttribute("data-l10n-args"))
			}]))[0].attributes.find(this.find).value;

			if (!star.matches(":hover")) return;

			var footer = "\n★ " + (
				starred
					? (len > 1 ? "Данные закладки добавлены" : "Данная закладка добавлена") + " в"
					: "Последний раз добавлялось в папку"
			) + ":\n" + paths;

			var text = header + this.help_star + footer;
			var tt = star.linkedTooltip;
			star.contains(tt.triggerNode) ? tt.label = text : star.tooltipText = text;
		}
		var url = "data:;charset=utf-8," + encodeURIComponent(`(${func})("${id}")`);
		g.ChromeUtils.compileScript(url).then(ps => ps.executeInGlobal(g));
	}
	await delayedStartupPromise;

	var stars = Array.from(document.querySelectorAll(sel));
	for(var star of stars) {
		star.linkedTooltip = stt.tt(window);
		star.addEventListener("mouseenter", stt);
	}
	var destructor = () => {
		for(var star of stars)
			star.removeEventListener("mouseenter", stt);
	}
	var ucf = window.ucf_custom_script_win || window.ucf_custom_script_all_win;
	if (ucf)
		ucf[id] = {destructor}, ucf.unloadlisteners.push(id);
	else
		window.addEventListener("unload", destructor, {once: true});
})("ucfBookmarksStarFTooltipHelper", "#star-button-box, #context-bookmarkpage");

(async def => CustomizableUI.createWidget({
	id: "ucf_IconsSiteButton",
	label: "Иконки сайтов на кнопке",
	localized: false,
	onCreated(btn) {

		var maybeSetImg = (e, icon) => {
			var tab = e.target;
			if (tab.selected) {
				var arr = e.detail.changed;
				if (arr.includes("selected") || arr.includes("image"))
					icon.src = tab.image || def;
			}
		}
		var type = "TabAttrModified";

		var render = function() {
			delete this.render;
			this.render();

			var {icon} = this;
			var win = this.ownerGlobal;
			var gb = win.gBrowser, tc = gb.tabContainer;

			var lst = e => maybeSetImg(e, icon);
			var unl = () => tc.removeEventListener(type, lst);

			tc.addEventListener(type, lst);
			win.addEventListener("unload", unl, {once: true});
			icon.src = gb.selectedTab.image || def;
		};
		(this.onCreated = btn => btn.render = render)(btn);
	}
}))("chrome://global/skin/icons/defaultFavicon.svg");

if (typeof IOUtils != "object") { // Firefox 78 ESR
	var {OS} = ChromeUtils.import("resource://gre/modules/osfile.jsm");
	var PathUtils = {join: (...args) => OS.Path.join(...args)};
	var IOUtils = {writeUTF8: (path, txt) => OS.File.writeAtomic(path, new TextEncoder().encode(txt))};
}
var {prefs, dirsvc} = Services, c = msg => Services.console.logStringMessage("[HC] "+ msg), // отладка
glob = { // глобальные функции - общие для всех скриптов custom_script_win.js
	switchTab(url, but = window) { // открыть вкладку | закрыть, если открыта
		for(var tab of but.ownerGlobal.gBrowser.tabs)
			if (tab.linkedBrowser.currentURI.spec == url) {but.ownerGlobal.gBrowser.removeTab(tab); return;}; // закрыть
		but.ownerGlobal.switchToTabHavingURI(url, true, {relatedToCurrent: true, triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal()});
	},
	showInStatus(info, time = 5000, StatusPanel = window.StatusPanel || win.StatusPanel) {
		if (StatusPanel.update.tid)
			clearTimeout(StatusPanel.update.tid)
		else {
			var {update} = StatusPanel;
			StatusPanel.update = () => {};
			StatusPanel.update.ret = () => {
				StatusPanel.update = update, StatusPanel.update();
			}
		}
		StatusPanel.update.tid = setTimeout(StatusPanel.update.ret, time);
		StatusPanel._label = info;
	}
},
gClipboard = {
	get ch() { delete this.ch;
		return this.ch = Cc["@mozilla.org/widget/clipboardhelper;1"].getService(Ci.nsIClipboardHelper);
	},
	write(str) { this.ch.copyStringToClipboard(str, Services.clipboard.kGlobalClipboard);}
}

(async win => ({ // UCF drag and go жесты мыши https://forum.mozilla-russia.org/viewtopic.php?pid=797234#p797234
	link: {
		R: {
			name: "Копировать ссылку в буфер обмена", cmd() {
				gClipboard.write(this.val); // глобальные функции
				glob.showInStatus('в буфере: ' + this.val);
			}
		},
		U: {
			name: "Открыть ссылку в новой активной странице", cmd() {
				win.openUILinkIn(this.val, "tab", this.opts);
			}
		},
		D: {
			name: "Открыть ссылку в новой фоновой странице", cmd() {
				win.openUILinkIn(this.val, "tabshifted", this.opts);
			}
		}
	},
	text: {
		U: {
			name: "Поиск текста поисковиком по умолчанию в новой активной странице", cmd() {
				this.search("tab");
			}
		},
		D: {
			name: "Поиск текста поисковиком по умолчанию в новой фоновой странице", cmd() {
				this.search("tabshifted");
			}
		}
	},
	search(where) {
		var engine = Services.search[`default${this.opts.private ? "Private" : ""}Engine`];
		var submission = engine.getSubmission(this.val, null, "");
		win.openUILinkIn(submission.uri.spec, where, {postData: submission.postData, ...this.opts});
	},
	opts: {
		//relatedToCurrent: true,
		triggeringPrincipal: Cu.getObjectPrincipal(this),
		get userContextId() {
			return parseInt(win.gBrowser.selectedBrowser.getAttribute("usercontextid"));
		},
		get private() {
			return win.PrivateBrowsingUtils.isWindowPrivate(win);
		}
	},
	dragstart(e) {
		win = e.view.windowRoot.ownerGlobal;
		//if (!win.gBrowser.currentURI.spec.startsWith("http")) return;
		if (!e.dataTransfer.mozItemCount || !win.gBrowser.selectedBrowser.matches(":hover"))
			return;

		var dt = e.dataTransfer;
		this.type = this.link;
		this.dir = this.val = "";

		var url = dt.getData("text/x-moz-url-data");
		if (url) this.val = url;
		else {
			var txt = dt.getData("text/plain");
			if (txt) {
				this.val = txt;
				if (!this.textLinkRe.test(txt)) this.type = this.text;
			}
			else return;
		}
		this.x = e.screenX; this.y = e.screenY;
		this.drag(true);
	},
	drag(init) {
		var meth = `${init ? "add" : "remove"}EventListener`;
		for(var type of this.events) win[meth](type, this, true);
		init || win.StatusPanel.panel.setAttribute("inactive", true);
	},
	events: ["dragover", "drop", "dragend"],
	dragover(e) {
		var {x, y} = this, cx = e.screenX, cy = e.screenY;
		var dx = cx - x, ax = Math.abs(dx), dy = cy - y, ay = Math.abs(dy);
		if (ax < 10 && ay < 10) return;

		this.x = cx; this.y = cy;
		var dir = ax > ay ? dx > 0 ? "R" : "L" : dy > 0 ? "D" : "U";
		if (this.dir.endsWith(dir)) return;

		dir = this.dir += dir;
		var obj = this.type[dir];
		var txt = `${obj ? "Ж" : "Неизвестный ж"}ест мыши: ${dir + (obj ? "  " + obj.name : "")}`;

		win.StatusPanel._labelElement.value = txt;
		win.StatusPanel.panel.removeAttribute("inactive");
	},
	dragend(e) {
		var dt = e.dataTransfer;
		this.drag();

		var obj = this.type[this.dir];
		if (!obj || dt.mozUserCancelled) return;

		var x = e.screenX, y = e.screenY;
		var wx = win.mozInnerScreenX, wy = win.mozInnerScreenY;
		x > wx && y > wy && x < wx + win.innerWidth && y < wy + win.innerHeight
			&& obj.cmd.call(this);
	},
	textLinkRe: /^([a-z]+:\/\/)?([a-z]([a-z0-9\-]*\.)+([a-z]{2}|aero|arpa|biz|com|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|pro|travel)|(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}[0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(:[0-9]{1,5})?(\/[a-z0-9_\-\.~]+)*(\/([a-z0-9_\-\.]*)(\?[a-z0-9+_\-\.%=&amp;]*)?)?(#[a-z][a-z0-9_]*)?$|^custombutton:\/\/\S+$/,

	observe(w) {
		this.drop = () => this.drag();
		this.handleEvent = e => this[e.type](e);
		var unload = e => {
			var w = e.target.ownerGlobal;
			w.gBrowser.tabpanels.removeEventListener("dragstart", this, true);
			if (w == win) win = null;
		}
		(this.observe = w => {
			//if (!w.toolbar.visible) return;
			w.gBrowser.tabpanels.addEventListener("dragstart", this, true);
			w.addEventListener("unload", unload, {once: true});
		})(w);
	},
	init(topic, self) {
		delete this.init;
		Services.obs.addObserver(self = this, topic);
		Services.obs.addObserver(function quit(s, t) {
			Services.obs.removeObserver(self, topic);
			Services.obs.removeObserver(quit, t);
		}, "quit-application-granted");
	}
}).init("browser-delayed-startup-finished"))();

(async (id, popup) => ({
	// interval: 1 * 10 * 1e3, // интервал обновления = 10 сек.
	// interval: 1 * 15 * 1e3, // интервал обновления = 15 сек.
	// interval: 1 * 30 * 1e3, // интервал обновления = 30 сек.
	// interval: 1 * 60 * 1e3, // интервал обновления = 1 мин.
	interval: 5 * 60 * 1e3, // интервал обновления = 5 мин.
	// interval: 15 * 60 * 1e3, // интервал обновления = 15 мин.
	// interval: 30 * 60 * 1e3, // интервал обновления = 30 мин.
	// interval: 60 * 60 * 1e3; // интервал обновления = 60 мин.

	init() {
		this.addStyle();
		var dsp = e => this[e.type](e);
		var tc = document.getElementById("tabbrowser-tabs");

		var types = ["popupshowing", "TabClose", "SSTabRestored"];
		(this.destructor = 
			(meth = "removeEventListener") => types.forEach(
				(type, ind) => (ind ? tc : popup)[meth](type, dsp)
			)
		)("addEventListener");

		ucf_custom_script_win[id] = this;
		ucf_custom_script_win.unloadlisteners.push(id);
	},
	initTab(tab) {
		SessionStore.setCustomTabValue(tab, id, "1");
		var img = document.createXULElement("hbox");
		img.className = id;
		// img.setAttribute("onclick", 'linkedObject.destroyTab(this.closest("tab"))');
		// img.linkedObject = this;
		tab.throbber.before(img);
		tab.setAttribute(id, setInterval(this.reload, this.interval, tab));
	},
	destroyTab(tab) {
		clearInterval(tab.getAttribute(id));
		SessionStore.deleteCustomTabValue(tab, id);
		tab.removeAttribute(id);
		tab.querySelector("." + id).remove();
	},
	addStyle() {
		var css = `
			tab.tabbrowser-tab[${id}] .${id} {
				width: 16px;
				height: 16px;
				position: relative;
				margin-top: -1px;
				margin-inline-start: -2px;
				margin-inline-end: -14px;
				background-position: top right;
				background-repeat: no-repeat;
				background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAJCAYAAADgkQYQAAAABGdBTUEAAK/INwWK6QAAABl0RVh0U29mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAAAEHSURBVHjaYmQAArWgflEglQrEgUCsAsR3gHg9EM++ta7wNSNIASMjQx/rr7fhEd6WrAbaygy3Hr1l2Hjw+u8Xbz+v/P+foYgFZIKEMG94foARKxfTDwZ3G3UGb6Cgj406a2rrhvDnbz5fZwJZ4W+vyRroacdw4MB+hjt37jA8e/aMYd/2NQzOxrKsIHmQIhU1OWGQ0xiSk5MZVFVVGdasWcPg4eHBYKglDxJWAVl3B+gGE5AV8vLyDLdv3wbTrKysDOuOHgMpugMyaT3IkbeBjgVJqKiogOnbUMeD5JmFNT1ufP3+S2b/mfua7z//YH778RvD1iO3GLoXHwH7DqionZGYcAIIMADkw2lofXkQ/wAAAABJRU5ErkJggg==");
				z-index: 1000;
			}
			tab.tabbrowser-tab[${id}]:-moz-locale-dir(rtl) .${id} {
				background-position: top right;
			}
			tab.tabbrowser-tab[${id}] .tab-icon-image {
				display: -moz-box;
			}
			tab.tabbrowser-tab[${id}][pendingicon] .tab-icon-image {
				visibility: hidden;
			}
			/*
			tab.tabbrowser-tab[${id}]:not([pendingicon]) .tab-icon-image:not([src]):not([busy]):not([pinned]):not([crashed]):not([sharing]),
			tab.tabbrowser-tab[${id}] .tab-icon-pending,
			tab.tabbrowser-tab[${id}] .tab-throbber {
				display: none;
			}
			*/
		`.replace(/;\s*\n/g, " !important;\n");
		windowUtils.loadSheetUsingURIString(
			"data:text/css," + encodeURIComponent(css), windowUtils.USER_SHEET
		);
	},
	checked(tab = TabContextMenu.contextTab) {
		return tab.hasAttribute(id);
	},
	cmd(tab) {
		this.checked(tab) ? this.destroyTab(tab) : this.initTab(tab);
	},
	reload(tab) {
		gBrowser.reloadTab(tab);
	},
	get shouldHide() {
		return !TabContextMenu.contextTab
			.linkedBrowser.currentURI.scheme.startsWith("http");
	},
	popupshowing(e) {
		if (this.shouldHide) return;

		var menuitem = this.menuitem = document.createXULElement("menuitem");
		menuitem.id = "cb_AutoReloadTab";
		menuitem.setAttribute("type", "checkbox");
		menuitem.setAttribute("label", "Автоматически перезагружать");
		menuitem.setAttribute("oncommand", "linkedObject.cmd(TabContextMenu.contextTab)");
		menuitem.linkedObject = this;
		popup.querySelector("#context_duplicateTab").after(menuitem);

		(this.popupshowing = e => e.target == popup
			&& !(menuitem.hidden = this.shouldHide)
			&& menuitem.setAttribute("checked", this.checked())
		)(e);
	},
	TabClose(e) {
		var intervalId = e.target.getAttribute(id);
		if (!intervalId) return;
		clearInterval(intervalId);
		var tab = e.detail.adoptedBy;
		tab && tab.ownerGlobal.ucf_custom_script_win[id].initTab(tab);		
	},
	SSTabRestored(e) {
		var tab = e.target;
		SessionStore.getCustomTabValue(tab, id)
			&& !tab.hasAttribute(id) && this.initTab(tab, true);
	}
}).init())("ucf-auto-reload", document.getElementById("tabContextMenu"));

// https://forum.mozilla-russia.org/viewtopic.php?pid=782375#p782375 .....
((g, id) => {
	addDestructor(r => r[5] == "e" && g[id]?.destroy());
	g[id] || ({
		check(channel) {
			var ua, {host} = channel.originalURI;

			if (host == "site1.org")
				ua = "User Agent 1";
			else if (host == "site2.com")
				ua = "User Agent 2";
			//else if (...

			ua && channel.setRequestHeader("User-Agent", ua, false);
		},
		init(topics) {
			var {obs} = Services;
			this.observe = subj => subj instanceof Ci.nsIHttpChannel && this.check(subj);
			obs.addObserver(g[id] = this, topics[0], false);
			obs.addObserver(this.destroy = () => delete g[id] && topics.forEach(
				(t, ind) => obs.removeObserver(ind ? this.destroy : this, t)
			), topics[1], false);
		}
	}).init(["http-on-modify-request", "quit-application-granted"]);
})(Cu.getGlobalForObject(Cu), "CBUserAgentRequestHeaderSetterObserver");

(async topic => {
	var observer = channel => {
		if (channel instanceof Ci.nsIHttpChannel) {
			var ua, {host} = channel.originalURI;

			if (host == "site1.org")
				ua = "User Agent 1";
			else if (host == "site2.com")
				ua = "User Agent 2";
			//else if (...

			ua && channel.setRequestHeader("User-Agent", ua, false);
		}
	}
	var obs = Cc["@mozilla.org/observer-service;1"]
		.getService(Ci.nsIObserverService);
	obs.addObserver(observer, topic);
	obs.addObserver(function quit(s, t) {
		obs.removeObserver(quit, t);
		obs.removeObserver(observer, topic);
	}, "quit-application-granted");
})("http-on-modify-request");