What information can we access from the client?

Question

I'm trying to compile a list of information that is accessible via javascript such as:

Geo-location
IP address
Browser software
Exit location
Entrance location

I understand that a user can alter any of this information and that it's reliability is purely trust related, but I am still interested in what other information can be mined from the client.

score 106 · Answer 1 · answered May 07 '16 at 20:21

Here is most of the information:

var info={

    timeOpened:new Date(),
    timezone:(new Date()).getTimezoneOffset()/60,

    pageon(){return window.location.pathname},
    referrer(){return document.referrer},
    previousSites(){return history.length},

    browserName(){return navigator.appName},
    browserEngine(){return navigator.product},
    browserVersion1a(){return navigator.appVersion},
    browserVersion1b(){return navigator.userAgent},
    browserLanguage(){return navigator.language},
    browserOnline(){return navigator.onLine},
    browserPlatform(){return navigator.platform},
    javaEnabled(){return navigator.javaEnabled()},
    dataCookiesEnabled(){return navigator.cookieEnabled},
    dataCookies1(){return document.cookie},
    dataCookies2(){return decodeURIComponent(document.cookie.split(";"))},
    dataStorage(){return localStorage},

    sizeScreenW(){return screen.width},
    sizeScreenH(){return screen.height},
    sizeDocW(){return document.width},
    sizeDocH(){return document.height},
    sizeInW(){return innerWidth},
    sizeInH(){return innerHeight},
    sizeAvailW(){return screen.availWidth},
    sizeAvailH(){return screen.availHeight},
    scrColorDepth(){return screen.colorDepth},
    scrPixelDepth(){return screen.pixelDepth},


    latitude(){return position.coords.latitude},
    longitude(){return position.coords.longitude},
    accuracy(){return position.coords.accuracy},
    altitude(){return position.coords.altitude},
    altitudeAccuracy(){return position.coords.altitudeAccuracy},
    heading(){return position.coords.heading},
    speed(){return position.coords.speed},
    timestamp(){return position.timestamp},


    };

I heard that's possible to get battery info from mobile device, and some website, such hotel reservation websites, increase their prices when your battery is near empty. — Below the Radar, Aug 31 '16 at 16:54
battery level is only accessible on some browsers, iOS 9 it's not available — Niel Ryan, Sep 10 '16 at 08:56
@BelowtheRadar https://developer.mozilla.org/en-US/docs/Web/API/Battery_Status_API — Pedro Lobito, Apr 19 '22 at 22:54
@PedroLobito Seems like Firefox and Safari are the only modern browsers that block "spoofing" on battery status https://groups.google.com/g/mozilla.dev.platform/c/5U8NHoUY-1k/m/9ybyzQIYCAAJ Another reason why I prefer FF over all — Below the Radar, Apr 22 '22 at 13:24
Navigator.appName is depcreated and returns always Netscape. https://developer.mozilla.org/en-US/docs/Web/API/Navigator/appName. The same counts for navigator.product (https://developer.mozilla.org/en-US/docs/Web/API/Navigator/product), navigator.appVersion (https://developer.mozilla.org/en-US/docs/Web/API/Navigator/appVersion). One can not rely on information gathered by these properties. — DanielHefti, Feb 20 '23 at 10:12

Marek Sebera · Accepted Answer · 2022-03-06T18:07:09.510

23

Don't forget about

Screen Size
Allowed Cookies
Allowed Java
Mobile or Desktop
Language

And here is useful link with data-mining demo:

http://www.alanwood.net/demos/browserinfo.html

edited Mar 06 '22 at 18:07

answered Nov 18 '11 at 09:34

Marek Sebera

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Thank's this is some useful information, notice some of the information it get's about me is a bit off like my max screen resolution being less than my current resolution but it's close enough. – George Reith Nov 18 '11 at 12:07
1

You probably can't get precise informations using this method. – Marek Sebera Nov 18 '11 at 12:44
client operating system – Cholthi Paul Ttiopic Feb 07 '19 at 08:34

score 8 · Answer 3 · answered Jan 20 '17 at 19:33

visitor.js is a javascript library that provides information about the client.

Including:

Continent, Country and city
Date of last visit
Referring website or search engine (including search term)
Time spent on the website
Browser and operating system
IP Address
Language
Browser
OS
Screen size

And more.

http://www.visitorjs.com/

Visitorjs might be very handy, it's not free however.

What information can we access from the client?

3 Answers3

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