Proxy Auto Auth extension (https://chrome.google.com/webstore/detail/proxy-auto-auth/ggmdpepbjljkkkdaklfihhngmmgmpggp?hl=en)

bg.js

//var bkg = chrome.extension.getBackgroundPage();
var calls = {};

// Shows settings on install.
chrome.runtime.onInstalled.addListener(function(details) {
	if(details.reason && (details.reason === 'install') || (details.reason === 'update')){
		chrome.tabs.create({url: "options.html"});
	}
});
// Show settings when clicking on the icon.
chrome.browserAction.onClicked.addListener(function() {
	chrome.tabs.create({url: "options.html"}, function(tab) {
		console.log('options loaded');
	});
});

/* Notifications */
chrome.notifications.onShowSettings.addListener(function(){
	chrome.tabs.create({url: "options.html"});
});
chrome.notifications.onClicked.addListener(function(id){
	if(id === NOTIFICATION_ID){
		chrome.tabs.create({url: "options.html"});
	}
});

/* Core */
chrome.webRequest.onAuthRequired.addListener(
	function(details) {
	
		var locked = isLocked();
		var idstr = details.requestId.toString();
	
		if(details.isProxy === true && !locked){
		
			console.log('AUTH - ' + details.requestId);
			//console.log(JSON.stringify(details));
			
			if(!(idstr in calls)){
				calls[idstr] = 0;
			}
			calls[idstr] = calls[idstr] + 1;
			
			var retry = parseInt(localStorage["proxy_retry"]) || DEFAULT_RETRY_ATTEMPTS || 5;
			
			if(calls[idstr] >= retry){
				lock();
				chrome.notifications.create(NOTIFICATION_ID, {
					'type': 'basic',
					'iconUrl': 'icon_locked_128.png',
					'title': 'Proxy Auto Auth error',
					'message': 'A lot of Proxy Authentication requests have been detected. There is probably a mistake in your credentials. For your safety, the extension has been temporary locked. To unlock it, click the save button in the options.',
					'isClickable': true,
					'priority': 2
				}, function(id){ 
					//console.log('notification callback'); 
				});
				calls = {};
				return({
					cancel : true
				});
			}
			
			var login = localStorage["proxy_login"];
			var password = localStorage["proxy_password"];
			
			if (login && password && !locked){
				return({
					authCredentials : {
						'username' : login,
						'password' : password
					}
				});
			}
		}
	},
	{urls: ["<all_urls>"]}, 
	["blocking"]
);

This is an extremely useful extension! thanks so much! could you add supports for adding the username and password from cmd, I found the following https://stackoverflow.com/questions/8725845/is-there-any-way-to-get-command-line-parameters-in-google-chrome-extension/9381181#9381181
chrome.windows.onCreated.addListener(function (window) { chrome.tabs.query({}, function (tabs) { var args = { username: null, password: null }, argName, regExp, match; for (argName in args) { regExp = new RegExp(argName + "=([^\&]+)") match = regExp.exec(tabs[0].url); if (!match) return; args[argName] = match[1]; } console.log(JSON.stringify(args)); }); });

this would mean that using cmd to open chrome to a URL for example chrome "http://127.0.0.1:0/?username=42&password=hello" would, as I understand - autofill the username and password fields. we use this extension to automatically authenticate our clients with our proxy so saving them having to enter the username and password into chrome would be helpful. and if it could also save them it would be a great help!