Does Internet Browser affect site speed? - google-chrome

I'm working on a client site and we pinpointed that their site loads slower on Chrome than other internet browsers:
We have run a pagespeed report on Google PageSpeed through Lighthouse as tried opening the site on different browsers in different locations and different computers
Fetch time: Apr 23, 2019, 8:13 AM GMT+2
Device: Emulated Nexus 5X
Network throttling: 150 ms TCP RTT, 1,638.4 Kbps throughput (Simulated)
CPU throttling: 4x slowdown (Simulated)
User agent (host): Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36
User agent (network): Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3694.0 Mobile Safari/537.36 Chrome-Lighthouse
CPU/Memory Power: 664
This is the first time we've seen this on a client site, specifically Chrome being slower. Could anyone provide a possible reason why? OR has anyone else seen this before?
Thanks in advance

By the way, if this is the first time you see the output shown above, than take note of Network throttling and CPU throttling. They are options that simulate a slow network and CPU overload, for a more realistic test environment.
There is ways to disable them, both on the Lighthouse CLI and from DevTools.
And in general, there is always going to be variability on the test results: https://github.com/GoogleChrome/lighthouse/blob/master/docs/variability.md

Related

Chrome shows wrong time zone

In Windows my time zone is set to UTC+2:00 Jerusalem
But several websites think I'm in UTC. And I see that Chrome reports my timezone as UTC. When I try this in my console
Intl.DateTimeFormat().resolvedOptions().timeZone
I get "UTC"
Though I can't for the life of me find any setting in Chrome that keeps it's own timezone.
I'm using WIndows 10. Here's the navigator.userAgent
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36"
If I run tzutil /g in the command line, I get:
Israel Standard Time
There are extensions that let me change the timezone. But I'd rather solve the issue. So I can help other clients with similar issues.
UPDATE
It seems that this isssue happens only in pages run from visual studio via IIS. If I check the timezone in regular gmail or wikipedia etc then the tiemzone is correct.
But in a browser that was opened from VS, when running my asp.net site, the timezone always shows UTC. Even if in said browser I will open wikipedia. Th browser somehow gets "set" to utc.
Where can this be fixed?
Thanks!
Try reseting your time zone again in Windows.
I had this issue a few days ago as well. What I did was to set the time zone to something else, apply, then back to the correct one and apply.

Chrome don't release memory after refresh a page when I open dev tool in v86

Performance monitor snapshot
All metrics in above snapshot keep climbing if i refresh any website while opening dev tool.
It's quite annoying while I am developing a web app with hot reloading.
env:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.80 Safari/537.36

Any security vulnerabilities with this JSON response?

I had to update a form on a certain webpage to change something i wanted.
I failed to do so, but instead of sending a simple text reply saying 'This cannot work' for example, they sent a whole JSON response on the display.
I'm just curious, does this response pose any security vulnerabilities for either me or the server i contacted to process my request?
P.S. The '***'s in the response are so because I'm not sure if providing that info is the right thing to do.
However, even without it, the response is fairly intuitive.
This is the response:
{"name":"StatusCodeError","statusCode":409,"message":"409 - [object Object]","error":{"status":"failure","message":"Email already taken.","code":91,"data":null,"error":{"message":"None"}},"options":{"uri":"*********","method":"POST","headers":{"Authorization":"Bearer *********=","Cookie":"*********=;cm_sub=denied","User-Agent":"********","Accept-Language":"en-US","Original-Accept-Language":"********","X-********-InstallId":"*****","X-*****-AppState":"active","X-*****-Parent-Rid":"********","X-*****-Root-Rid":"********","X-*****-Rid":"*****","X-Pixel-Ratio":1,"X-*****-App-Type":5,"X-Prefer-User-Locale":"1","X-Real-Ip":"********","X-*****-Real-Ip":"*****","X-*****-Csrf":"********","X-*****-Browser-Extension-Installed":"false","X-********-Referrer":"********","X-Bot":"false","X-Referrer":"********","X-Url":"********"},"form":{"base_scheme":"https","client_id":1431601,"timestamp":*****,"country":"US","email":"*****","oauth_signature":"********"},"traceId":false,"parseJson":true,"resolveWithFullResponse":true,"json":true,"simple":true},"response":{"statusCode":409,"body":{"status":"failure","message":"********","code"********,"data":null,"error":{"message":"None"}},"headers":{"server":"nginx","date":"Sun, 10 Mar 2019 16:08:31 GMT","content-type":"application/json","content-length":"112","connection":"close","*****-version":"*****","x-content-type-options":"*****","x-frame-options":"DENY","*****-generated-by":"********"},"request":{"uri":{"protocol":"http:","slashes":true,"auth":null,"host":"*****","port":"*****","hostname":"localhost","hash":null,"search":null,"query":null,"pathname********","path":"/v3/users/settings/","href":"********"},"method":"POST","headers":{"Authorization":"********","Cookie*********","User-Agent":"Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/******** Safari/537.36","Accept-Language":"en-US","Original-Accept-Language":"en-US,en;q=0.9","X-*****-InstallId":"********","X-*****-AppState":"active","X-*****-Parent-Rid":"********","X-*****-Root-Rid":"*************","X-*****-Rid":"*****","X-Pixel-Ratio":1,"X-*****-App-Type":5,"X-Prefer-User-Locale":"1","X-Real-Ip":"*****","X-*****-Real-Ip":"********","X-********-Csrf":"********","X-*****-Browser-Extension-Installed":"false","X-********-Referrer":"*************","X-Bot":"false","X-Referrer":"********","X-Url":"********","content-type":"application/x-www-form-urlencoded","accept":"application/json","content-length":179}}}}
Here's what I learned from this server response. The first thing I noticed is your protocol is using http.
"protocol":"http:"
HTTP is a plaintext and unencrypted form of communication. This is important to note because if someone is sniffing your traffic, they will be able to read the transmission as you have posted it here (without the *****'s blocking sensitive data).
The next thing I noticed is your authorization token.
"Authorization":"Bearer *********="
Given that the message is in plaintext, an attacker will be able to steal your token. Using this token an attacker can communicate with the server as an authorized user, gaining access to (and possibly the ability to modify) private information.
On the flip side, since we assume the attacker has sniffed your unencrypted traffic. They can also make note of your client's computer/ browser information:
"User-Agent":"Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/******** Safari/537.36"
From this info, the attacker can gather that the client is using windows 8.1 and what browsers/versions are installed on the client's computer. With these system specs, the attacker can launch a targeted attack on the client's computer (especially if you have an outdated/ insecure OS or browser version).
So to answer your question, yes there are security vulnerabilities for both the client and server.
However, simply switching from HTTP to HTTPS would make a big difference in limiting your exposure.

What UserAgent is used by Hosted Web Apps created by Windows App Studio?

I have created a Hosted Web App using Windows App Studio. But in order to track it's usage in Google Analytics, I need to know what UserAgent agent a Hosted Web App uses. Does anyone know?
Hosted Web Apps actually use a WebView control (with some restictions) in order to show the web content within the app. You can track request becoming from your Hosted Web App when the user agent contains "MSAppHost" in it:
"Mozilla/5.0 (Windows NT 10.0; Win64; x64; MSAppHost/3.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586"
Here you have more details: https://msdn.microsoft.com/en-us/library/hh869301(v=vs.85).aspx

Websockets not connecting from any browser on my machine

This is a maddening problem I come across once or twice every few months: websockets aren't working right. Here's the facts:
My browser can connect to my local (loopback) server, but when the browser sends messages, the server never gets them.
This has happened a few times to me before in the last 6 months - it always seems to start working without any change on my end, and for no apparent reason
This started happening right after I restarted my computer...
http://www.websocket.org/echo.html also doesn't work
The connection is being closed with code 1006, wasClean is false, and reason is a blank string
Firefox and chrome both have this problem
I've confirmed that turning off my firewall (windows 7) doesn't change anything
I've also confirmed that a node.js client and server works on linux (centos 6 VM running inside my windows machine), but the same client and server setup doesn't work on my windows machine (tho when I tested on a different windows 7 machine, it works fine)
Here's the info from chrome's network tab:
Request URL:ws://echo.websocket.org/?encoding=text
Request Method:GET
Status Code:101 Web Socket Protocol Handshake
Request Headers CAUTION: Provisional headers are shown.
Cache-Control:no-cache
Connection:Upgrade
Cookie:__utma=9925811.1690403310.1402691326.1402691326.1402691326.1; __utmb=9925811.13.10.1402691326; __utmc=9925811; __utmz=9925811.1402691326.1.1.utmcsr=google|utmccn=(organic)|utmcmd=organic|utmctr=(not%20provided)
Host:echo.websocket.org
Origin:http://www.websocket.org
Pragma:no-cache
Sec-WebSocket-Extensions:permessage-deflate; client_max_window_bits, x-webkit-deflate-frame
Sec-WebSocket-Key:eH9OcxKQ/I6S+IkzY+HsaA==
Sec-WebSocket-Version:13
Upgrade:websocket
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.131 Safari/537.36
Query String Parametersview sourceview URL encoded
encoding:text
Response Headers
Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:x-websocket-protocol
Access-Control-Allow-Headers:x-websocket-version
Access-Control-Allow-Headers:x-websocket-extensions
Access-Control-Allow-Headers:authorization
Access-Control-Allow-Headers:content-type
Access-Control-Allow-Origin:http://www.websocket.org
Connection:Upgrade
Date:Fri, 13 Jun 2014 21:36:59 GMT
Sec-WebSocket-Accept:d0eOTUUxMpkKsI6x9RJ+vGBxl3w=
Server:Kaazing Gateway
Upgrade:WebSocket
Is there something that looks wrong in those headers? Anyone have any idea what might be going on? Its like my computer is blocking websocket messages but not connections.
UPDATE:
Unbelievable. I literally have taken no action to correct this. I haven't restarted, changed settings, or installed or uninstalled anything. But the problem is gone - messages now go through as normal. Why is this happening?
Try to enable WebSocket Protocol.
Go to :
Control Panel -> Program and fonctionality -> Enable or disable windows features