Report browser settings like
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Latest commit 53fa4bf Aug 14, 2018


Report browser settings like in a JavaScript object.

Often, when a visitor to your website reports an issue, it can be difficult or impossible to reproduce the same issue without asking your visitor what software and settings they use.

Lately, in this situation, I ask my visitors to send me the report from But then, I realized that most of that information is available, via JavaScript, by parsing the user agent when the visitor is submitting their issue. So I set out to create a script that would provide that information.

Note, this is meant for reporting and not for application logic; your application should use feature detection, not browser detection. Therefore, only the most common browser names and OS names are reported, see the Coverage section below for more details. The full user agent string is always provided and it can help you identify any browser. If you need to report on every browser and OS or other information in the user agent string, then take a look at platform.js and/or UAParser.js.


Package manager support is planned, but for now load this script into a browser and call browserReport() with a callback. Note, some values maybe null if the information is not available.

Asynchronous Usage

<script src="browser-report.js"></script>
    browserReport(function (err, report) {
        if (err) {
            throw err;

Synchronous Usage

Note, the remote client IP address is not available in the synchronous function call.

<script src="browser-report.js"></script>
    var report = browserReportSync();

Report Object Format

The report object has the following keys and value types.

    "browser": {
        "name": (string),
        "version": (string)
    "cookies": (boolean),
    "flash": {
        "version": (string)
    "ip": (string),
    "java": {
        "version": (string)
    "lang": (array || string),
    "os": {
        "name": (string),
        "version": (string)
    "screen": {
        "colors": (number),
        "dppx": (number),
        "height": (number),
        "width": (number)
    "scripts": (boolean),
    "timestamp": (string),
    "userAgent": (string),
    "viewport": {
        "height": (number),
        "layout": {
            "height": (number),
            "width": (number)
        "width": (number),
        "zoom": (number)
    "websockets": (boolean)


The goal is to correctly identify all browsers included on according to their browser usage table. As of January 18, 2017, their browser usage table accounts for 95.76% of global usage based on data from StatCounter GlobalStats.

Coverage, as of August 13, 2018, matches at 95.76%


The script file size is roughly 3K when gzipped and roughly 2K when uglified and gzipped. The synchonous call takes about 4ms on a 2.3 GHz Intel Core i7 with Google Chrome 68. The asynchronus call is largely dependant on how long it takes for to repond with the IP address.


In chronological order (oldest first); not in order of priority.

  • add module support for node, es2016, commonJS, and bower
  • server side support (node)
    • not all information is available server side
    • but a lot of information can be extracted from the user agent
    • and the remote IP address is available
  • report on other/all plugins
  • report on value for font size of root element
  • report on the client's Do-Not-Track setting
  • report if the client supports third-party cookies
  • add more test cases for older versions of browsers
  • document the logic for which OSes will be properly detected
  • add tests for operating systems
  • add custom website
  • add badges
  • add test coverage with node-qunit
  • setup travis-ci

Change Log

2.2.9 – August 13, 2018

  • fixed bug in version number for Android Browser
  • updated test cases based on lastest stats from
  • added performance marks and measures to sample page
  • updated documentation

2.2.8 – January 18, 2017

  • added test cases for detecting Opera Mobile
  • added test cases for detecting Samsung Internet
  • added test cases for detecting UC Browser 11
  • added test case for detecting Safari on iOS 10
  • added test case for detecting Opera 42 on Windows
  • added test case for detecting Edge 14 on Windows
  • updated test cases for major browsers to latest versions

2.2.7 – July 11, 2016

  • updated cookie detection to workaround Microsoft Edge behavior

2.2.6 — February 4, 2016

  • Updated browser usage stats
  • Updated benchmarks
  • Updated build to run tests before build
  • Simplified code for deprecated values

2.2.5 — February 2, 2016

  • converted Markdown links to references
  • updated documentation
  • fixed bugs in IE8
  • updated sample to run in IE 8, 7, and 6

2.2.4 — February 1, 2016

  • added test cases and detection for
    • Opera Mini
    • Opera 15 and above
    • Opera 12 and below
    • Opera 9 and below
    • BlackBerry Browser 6, 7, and 10

2.2.3 – January 29, 2016

  • added test cases
    • Firefox on Android and iOS
    • UC Browser for Android
  • improved browser and os detection

2.2.2 – January 29, 2016

  • added test case for Nokia Lumia 625
  • improved browser and os detection

2.2.1 – January 29, 2016

  • added unit tests
  • improved browser and os detection

2.2.0 – January 14, 2016

  • added raw values for width and height of screen
  • added value for dots per pixel (dppx) of screen
  • deprecated screen.size and screen.resolution
  • added raw values for width and height of visual viewport
  • deprecated browser.size
  • added raw values for width and height of layout viewport
  • added value for zoom level of visual viewport

2.1.0 – January 13, 2016

  • added a sample webpage

2.0.1 - December 21, 2015

  • fixed bug in IE8 when checking plugins

2.0.0 – October 26, 2015

  • browserReport() is now async and expects a callback
  • the previous synchronous function can still be found in browserReportSync()
  • the remote client IP address is now reported from
  • a random UUID is now generated for cookie test instead of using the same UUID every time
  • report now includes the client's preferred language(s) for displaying pages
  • report now includes a timestamp with the client's locale date, time and time zone

1.0.0 — September 11, 2015

  • initial version
  • reports the same browser details as, except IP address


This Q&A on StackOverflow is what got me started on creating this.


browser-report is available under the MIT License.