var EXPORTED_SYMBOLS = ["MouseImgSaverChild", "MouseImgSaverParent"]; // сохранить картинку — перетащив вправо; колёсиком

var u = {get it() {
	delete this.it;
	return this.it = Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools);
}};
for(let name of ["E10SUtils", "PrivateBrowsingUtils"])
	ChromeUtils.defineModuleGetter(u, name, `resource://gre/modules/${name}.jsm`);

class MouseImgSaverChild extends JSWindowActorChild {
	handleEvent(e) { // клики мышью
		if (e.button > 1) return; // только ЛКМ, СКМ
		var trg = e.explicitOriginalTarget;
		trg.nodeType == Node.ELEMENT_NODE
			&& trg instanceof Ci.nsIImageLoadingContent
			&& this[e.type](trg, e);
	}
	handleDragEvent(e) {
		this[e.type](e);
	}
	dragstart(trg, e) {
		this.trg = trg;
		this.x = e.screenX; this.y = e.screenY;
		this.drag("add");
		this.handleEvent = this.handleDragEvent;
		this.checkTextLinkyTool(trg.ownerDocument);
	}
	events = ["dragover", "drop", "dragend"];
	drag(meth = (delete this.handleEvent, delete this.trg, "remove")) {
		meth += "EventListener";
		var win = this.contentWindow;
		for(var type of this.events) win[meth](type, this, true);
	}
	drop() {
		this.drag();
	}
	dragover(e) {
		var {x, y} = this,
			cx = e.screenX, cy = e.screenY,
			dx = cx - x,
			ax = Math.abs(dx), ay = Math.abs(cy - y);

		if (ax < 10 && ay < 10) return;
		if (dx < 0 || ax < ay) return this.drag();
		this.x = cx; this.y = cy;
	}
	dragend(e) {
		var dt = e.dataTransfer, {trg} = this;
		this.drag();
		dt.mozUserCancelled || this.send(trg, e.screenX);
	}
	auxclick(trg) { // клик СКМ
		trg.matches(":any-link :scope") || this.send(trg);
	}
	dblclick(trg) { // ЛКМ
		trg.matches(":any-link :scope")
			|| this.sendAsyncMessage("dblclick", (trg.currentRequestFinalURI || uri).spec);
	}
	send(trg, sx) {
		var uri = trg.currentURI;
		if (!uri) return;

		var doc = trg.ownerDocument;
		var cookieJarSettings = u.E10SUtils
			.serializeCookieJarSettings(doc.cookieJarSettings);

		var referrerInfo = Cc["@mozilla.org/referrer-info;1"]
			.createInstance(Ci.nsIReferrerInfo);
		referrerInfo.initWithElement(trg);
		referrerInfo = u.E10SUtils.serializeReferrerInfo(referrerInfo);

		var contentType = null, contentDisposition = null;
		try {
			var props = u.it.getImgCacheForDocument(doc).findEntryProperties(uri, doc);
			var cs = Ci.nsISupportsCString;
			try {contentType = props.get("type", cs).data;} catch {}
			try {contentDisposition = props.get("content-disposition", cs).data;} catch {}
		} catch {}

		this.sendAsyncMessage("", {
			title: trg.closest("[title]")?.title,
			url: (trg.currentRequestFinalURI || uri).spec,
			contentType, referrerInfo, cookieJarSettings, contentDisposition, sx,
			isPrivate: u.PrivateBrowsingUtils.isContentWindowPrivate(trg.ownerGlobal)
		});
	}
	checkTextLinkyTool(doc) {
		if (doc.title || !doc.documentURI.startsWith("moz-extension:")) return;
		var lab = doc.querySelector("body > label#lblFrom:first-child")?.textContent;
		if (lab) doc.title = lab.slice(0, lab.lastIndexOf("("));
	}
}
if (!ChromeUtils.domProcessChild.childID) {
	ChromeUtils.registerWindowActor("MouseImgSaver", {
		allFrames: true,
		parent: {moduleURI: __URI__},
		messageManagerGroups: ["browsers"],
		child: {moduleURI: __URI__, events: {auxclick: {capture: true}, dblclick: {capture: true}, dragstart: {capture: true}}}
	});
	var wref, titles = Object.create(null);
	var data = Object.assign(Object.create(null), {
		"browser.download.dir": {type: "String", get set() {

			var win = wref.get(), {prefs, dirsvc} = win.Services
			var {DownloadPaths, FileUtils} = win;
			var map = val => DownloadPaths.sanitize(val);

			win.Downloads.getList(win.Downloads.ALL).then(list => list.addView({
				onDownloadChanged(download) {
					if (!download.stopped) return;
					var {url} = download.source, title = titles[url];
					if (!title) return;
					delete titles[url];
					if (!download.succeeded) return;

					var file = FileUtils.File(download.target.path), {leafName} = file;
					var ext = leafName.slice(leafName.lastIndexOf("."));
					var newName = map(title) + ext, {parent} = file;
					var newFile = parent.clone();
					newFile.append(newName);
					try {
						newFile.createUnique(file.NORMAL_FILE_TYPE, file.permissions);
						file.renameTo(parent, newFile.leafName);
						download.target.path = newFile.path;
						download.refresh();
					} catch {}
				}
			}));
			Object.defineProperty(this, "set", {get() {
				try {var dir = prefs.getComplexValue("browser.download.dir", Ci.nsIFile);} catch {var dir = dirsvc.get("DfltDwnld", Ci.nsIFile);}

				var arr = prefs.getStringPref("ucf_save.dirs", "_Web||_Images|0").split('|').slice(2, 4); // [Загрузки]/папки ucf_save/файл
				arr[1] = (arr[1]) ? wref.get().gBrowser.selectedTab.label.slice(0, 64).replace(/ \| Форум Mozilla Россия$| — Mozilla Firefox|[\\\/?*\"'`]+/g,'').replace(/\s+/g,' ').replace(/[|<>]+/g,'_').replace(/:/g,'։').trim() : ""; // имя вкладки
				arr.map(map).forEach(dir.append); // ucf_save.dirs: путь для html|имя или домен|папка графики|имя вкладки
				dir.exists() && dir.isDirectory() || dir.create(dir.DIRECTORY_TYPE, 0o777); // создать папку, если не существует…
				return dir.path;
			}});
			return this.set;
		}},
		"browser.download.folderList": {type: "Int", set: 2},
		"browser.download.useDownloadDir": {type: "Bool", set: true}
	});
	var MouseImgSaverParent = class extends JSWindowActorParent {
		receiveMessage(msg) {
			var win = msg.target.browsingContext.topChromeWindow;
			var {name} = msg;
			if (name) return this[name](win, msg.data);

			var {url, contentType, contentDisposition, sx, title,
				isPrivate, referrerInfo, cookieJarSettings} = msg.data;
			if (sx && sx > win.mozInnerScreenX + win.innerWidth) return;

			if (title) titles[url] = title;

			wref = Cu.getWeakReference(win);
			var p = win.Services.prefs;

			for(var pref in data) {
				var obj = data[pref], meth = `et${obj.type}Pref`;
				obj.val = p.prefHasUserValue(pref) ? p["g" + meth](pref) : null;
				p["s" + meth](pref, obj.set);
			}
			try {win.internalSave(
				url,
				null, // document
				null, // file name
				contentDisposition,
				contentType,
				false, // do not bypass the cache
				null, // filepicker title key
				null, // chosen data
				u.E10SUtils.deserializeReferrerInfo(referrerInfo),
				u.E10SUtils.deserializeCookieJarSettings(cookieJarSettings),
				win.document, // initiating doc
				true, // skip prompt for where to save
				null, // cache key
				isPrivate,
				win.document.nodePrincipal
			);}
			finally {
				for(var pref in data) data[pref].val === null
					? p.clearUserPref(pref)
					: p[`set${data[pref].type}Pref`](pref, data[pref].val);
			}
		}
		dblclick(win, imgURL) {
			var url = "data:text/plain;charset=utf-8," + encodeURIComponent(
				"Поиск дубликата этой картинки в Яндекс.\n\n" + imgURL
			);
			var gb = win.gBrowser;
			var index = gb.selectedTab._tPos + 1;
			gb.selectedTab = gb.addTrustedTab(url, {index});
		}
	}
}

var url = "chrome://user_chrome_files/content/Help.html";
var exists = Cc["@mozilla.org/chrome/chrome-registry;1"]
	.getService(Ci.nsIXULChromeRegistry)
	.convertChromeURL(Services.io.newURI(url))
	.QueryInterface(Ci.nsIFileURL).file.exists();
	
alert(exists);

function showInStatusPanel(str) {
	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, 5000);
	StatusPanel._label = str;
}
showInStatusPanel(Math.random());

gBrowser.selectedTab = Array.from(gBrowser.tabs).reduce((prev, curr) =>
	curr.closing || curr.selected
	|| curr._notselectedsinceload !== false
	|| curr.lastAccessed < prev.lastAccessed
		? prev : curr
, {});

…
                    } else if (event.button == 1) {
                        if (Services.prompt.confirm(null, "Title", "Message"))
                            [...gtBrowser.tabs].forEach((tab)=> gtBrowser.removeTab(tab));

FullZoom.reset();
(function(val) {    
    var cps2 = Cc["@mozilla.org/content-pref/service;1"].getService(Ci.nsIContentPrefService2);
    cps2.setGlobal(window.FullZoom.name, val, Cu.createLoadContext());
})(1.15);

((url, val) => FullZoom._cps2.set(
	FullZoom._cps2.extractDomain(url),
	FullZoom.name, val, Cu.createLoadContext()
))("about:addons", 1.09);

((url, val) => FullZoom._cps2.set(
	FullZoom._cps2.extractDomain(url),
	FullZoom.name, val, Cu.createLoadContext()
))("https://hdrezka-ag.com/", 1.21);
((url, val) => FullZoom._cps2.set(
	FullZoom._cps2.extractDomain(url),
	FullZoom.name, val, Cu.createLoadContext()
))("https://kinokrad.co/", 1.21);
((url, val) => FullZoom._cps2.set(
	FullZoom._cps2.extractDomain(url),
	FullZoom.name, val, Cu.createLoadContext()
))("https://bigcinema.tv/", 1.21);
((url, val) => FullZoom._cps2.set(
	FullZoom._cps2.extractDomain(url),
	FullZoom.name, val, Cu.createLoadContext()
))("https://filmix.ac/", 1.21);

(lc => {
	var {_cps2, name} = FullZoom;
	_cps2.removeByName(name, lc, {handleCompletion() {
		_cps2.setGlobal(name, 1.15, lc);
		for(var [url, zoom] of Object.entries({

			"about:addons": 1.09,
			"hdrezka-ag.com": 1.21,
			"kinokrad.co": 1.21,
			"bigcinema.tv": 1.21,
			"filmix.ac": 1.21,
		}))
			_cps2.set(_cps2.extractDomain(url), name, zoom, lc);
	}});
})(Cu.createLoadContext());

(lc => {
	var {_cps2, name} = FullZoom;
	_cps2.removeByName(name, lc, {handleCompletion() {
		_cps2.setGlobal(name, 1.15, lc);
		for(var [url, zoom] of Object.entries({

			"about:addons": 1.09,
			"hdrezka-ag.com": 1.21,
			"kinokrad.co": 1.21,
			"bigcinema.tv": 1.21,
			"filmix.ac": 1.21,
		}))
			_cps2.set(_cps2.extractDomain(url), name, zoom, lc);
	}});
})(Cu.createLoadContext());

(key => {
	var wto = gURLBar[key];
	gURLBar[key] = function() {
		try {
			var {keyword, url} = this._resultForCurrentValue.payload;
			if (keyword && url.startsWith("javascript:")) return "current";
		} catch {}
		return wto.apply(this, arguments);
	}
	addDestructor(() => delete gURLBar[key]);
})("_whereToOpen");

/*
    // Only handle middle-click or left-click with modifiers.
    let modifKey;
    if (AppConstants.platform == "macosx") {
      modifKey = aEvent.metaKey || aEvent.shiftKey;
    } else {
      modifKey = aEvent.ctrlKey || aEvent.shiftKey;
    }

    if (aEvent.button == 2 || (aEvent.button == 0 && !modifKey)) {
      return;
    }
*/
    // Only handle middle-click or left-click with shift.
    if (aEvent.button == 2 || (aEvent.button == 0 && !aEvent.shiftKey)) {
      return;
    }

/*
    // right-clicks are not handled here
    if (event.button == 2) {
      return;
    }
*/
    // right-clicks and left-clicks with ctrl-only are not handled here
    if (event.button == 2 || (event.button == 0 && event.ctrlKey && !event.shiftKey && !event.altKey)) {
      return;
    }

.....

/*
    let metaKey =
      AppConstants.platform === "macosx" ? event.metaKey : event.ctrlKey;
    let modifKey = metaKey || event.shiftKey;
*/
    let modifKey = event.shiftKey;

/*
			win.document.getElementById("star-button-box")
				.after(win.document.importNode(df, true));
			this.notify();
		})(win);
	},
*/
			var clone = win.document.importNode(df, true);
			clone.firstChild.oncontextmenu = this.about;
			win.document.getElementById("star-button-box").after(clone);
			this.notify();
		})(win);
	},
	about(e) {
		var gb = e.view.gBrowser;
		gb.selectedTab = gb.addTrustedTab(`about:${
			e.ctrlKey ? "debugging#/runtime/this-firefox" : "performance"
		}`);
	},