Know your browser by its JavaScript properties!

The following tables display values returned by JavaScript properties of system settings. Red characters signal catched exceptions.

You can clone the code from GitHub:

$ git clone https://github.com/CarlOrff/protocoljs.git

URL

Property	Output
`location.hash`
`location.host`	`ingram-braun.net`
`location.hostname`	`ingram-braun.net`
`location.href`	`https://ingram-braun.net/erga/know-your-browser-by-its-javascript-properties/`
`location.origin`	`https://ingram-braun.net`
`location.pathname`	`/erga/know-your-browser-by-its-javascript-properties/`
`location.port`
`location.protocol`	`https:`
`location.search`
`document.referrer`

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Platform

Property	Output
`navigator.appCodeName`	`Mozilla`
`navigator.appName`	`Netscape`
`navigator.appVersion`	`5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)`
`navigator.battery.charging`	`TypeError: Cannot read properties of undefined (reading 'charging')`
`navigator.battery.chargingTime`	`TypeError: Cannot read properties of undefined (reading 'chargingTime')`
`navigator.battery.dischargingTime`	`TypeError: Cannot read properties of undefined (reading 'dischargingTime')`
`navigator.battery.level`	`TypeError: Cannot read properties of undefined (reading 'level')`
`navigator.cookieEnabled`	`true`
`navigator.geolocation`	`[object Geolocation]`
`navigator.language`	`en-US`
`navigator.onLine`	`true`
`navigator.platform`	`Linux x86_64`
`navigator.systemLanguage`	`undefined`
`navigator.userAgent`	`Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)`
`navigator.getUserMedia`	`function getUserMedia() { [native code] }`
`navigator.mozGetUserMedia`	`undefined`
`navigator.msGetUserMedia`	`undefined`
`navigator.webkitGetUserMedia`	`function webkitGetUserMedia() { [native code] }`

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Browser window

Property	Output
`defaultStatus`	`ReferenceError: defaultStatus is not defined`
`history.length`	`2`
`innerHeight`	`720`
`innerWidth`	`1280`
`length`	`0`
`locationbar.visible`	`true`
`menubar.visible`	`true`
`name`
`offscreenBuffering`	`true`
`outerHeight`	`720`
`outerWidth`	`1280`
`pageXOffset`	`0`
`pageYOffset`	`0`
`personalbar.visible`	`true`
`scrollbars.visible`	`true`
`status`
`statusbar.visible`	`true`
`toolbar.visible`	`true`

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Screen

Property	Output
`screen.availHeight`	`720`
`screen.availLeft`	`0`
`screen.availTop`	`0`
`screen.availWidth`	`1280`
`screen.colorDepth`	`24`
`screen.height`	`720`
`screen.pixelDepth`	`24`
`screen.width`	`1280`
`screenLeft`	`0`
`screenTop`	`0`
`screenX`	`0`
`screenY`	`0`

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Performance

Property	Output
`performance.mark("test_mark")`	`[object PerformanceMark]`
`performance.measure("test_mark")`	`[object PerformanceMeasure]`
`performance.clearMarks("test_mark")`	`undefined`
`performance.getEntriesByType("mark")`
`performance.getEntriesByType("measure")`	`[object PerformanceMeasure],[object PerformanceMeasure]`
`performance.getEntriesByName("test_mark")`	`[object PerformanceMeasure],[object PerformanceMeasure]`
`performance.now()`	`1205.5999999642372`
`performance.toJSON()`	`[object Object]`
`performance.memory.jsHeapSizeLimit`	`3760000000`
`performance.memory.totalJSHeapSize`	`10000000`
`performance.memory.usedJSHeapSize`	`10000000`
`performance.navigation.redirectCount`	`1`
`performance.navigation.type`	`0`
`performance.timing.connectEnd`	`1745661590332`
`performance.timing.connectStart`	`1745661590332`
`performance.timing.domainLookupEnd`	`1745661590332`
`performance.timing.domainLookupStart`	`1745661590332`
`performance.timing.domComplete`	`0`
`performance.timing.domContentLoadedEventEnd`	`1745661590966`
`performance.timing.domContentLoadedEventStart`	`1745661590966`
`performance.timing.domInteractive`	`1745661590829`
`performance.timing.domLoading`	`1745661590791`
`performance.timing.fetchStart`	`1745661590332`
`performance.timing.loadEventEnd`	`0`
`performance.timing.loadEventStart`	`0`
`performance.timing.msFirstPaint`	`undefined`
`performance.timing.navigationStart`	`1745661589769`
`performance.timing.redirectEnd`	`1745661590332`
`performance.timing.redirectStart`	`1745661589769`
`performance.timing.requestStart`	`1745661590333`
`performance.timing.responseEnd`	`1745661590788`
`performance.timing.responseStart`	`1745661590787`
`performance.timing.secureConnectionStart`	`0`
`performance.timing.unloadEventEnd`	`0`
`performance.timing.unloadEventStart`	`0`

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Plugins

#	name	description	filename	length (# MIME)

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MIME types

#	type	description	suffixes	enabledPlugin

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