Cloudflare can detect fake fingerprints.

[alpgul]

Description

If I set any option(chrome,edge,opera,safari) other than Firefox in the navigation options, Cloudflare CAPTCHA cannot be bypassed.

Expected Behaviour

Cloudflare is expected to solve the CAPTCHA and redirect to the page.

Current Behaviour

Cloudflare CAPTCHA is not being solved, and the CAPTCHA page is being opened again.

Steps to Reproduce (for bugs)

1. create a fresh Firefox profile
2. Install CanvasBLocker
3. Open CanvasBLocker Setting
4. Click Api
5. Open CanvasBlocker navigator settings
6. Click Chrome
7. Open cloudflare link
8. Click Checkbox

Your Environment

CanvasBlocker Version used: 1.10.1 Firefox version incl. 32- or 64-bit: 125.0.0 (64 bit) Operating System and version (desktop or mobile): Windows 10 Installed addons: in the new profile no other extensions are present

Your Settings

{
	"logLevel": 1,
	"urlSettings": [
		{
			"url": "mail.google.com",
			"protectDOMRect": false
		},
		{
			"url": "onedrive.live.com",
			"protectDOMRect": false
		},
		{
			"url": "paypal.com",
			"protectWindow": false
		},
		{
			"url": "dhl.de",
			"protectWindow": false
		},
		{
			"url": "www.youtube.com",
			"blockMode": "allowEverything"
		}
	],
	"hiddenSettings": {
		"protectScreen": false,
		"protectedAPIFeatures": false,
		"displayAdvancedSettings": false
	},
	"expandStatus": {
		"screenSize": true,
		"protectScreen": true,
		"section_Canvas-API": true,
		"protectNavigator": true,
		"protectTextMetrics": false,
		"protectAudio": true,
		"fakeMinimalScreenSize": true,
		"useAudioCache": false,
		"historyLengthThreshold": false
	},
	"displayHiddenSettings": true,
	"whiteList": "",
	"sessionWhiteList": "",
	"blackList": "",
	"blockMode": "fake",
	"protectedCanvasPart": "input",
	"minFakeSize": 10,
	"maxFakeSize": 1000000,
	"rng": "persistent",
	"protectedAPIFeatures": {},
	"useCanvasCache": true,
	"ignoreFrequentColors": 3,
	"minColors": 3,
	"fakeAlphaChannel": true,
	"webGLVendor": "",
	"webGLRenderer": "",
	"webGLUnmaskedVendor": "",
	"webGLUnmaskedRenderer": "",
	"persistentRndStorage": "{\"shared://domain\":[124,39,57,100,157,55,138,143,11,38,143,212,252,41,158,147,13,147,167,39,21,55,129,116,50,248,178,108,88,122,245,147,144,92,131,141,43,77,145,219,28,182,158,251,169,194,63,13,254,202,221,51,155,186,57,23,22,57,13,230,101,76,2,122,109,20,14,226,106,107,68,31,253,144,136,191,223,130,72,206,224,195,214,164,226,132,71,87,145,221,134,208,246,60,150,156,207,85,187,140,173,71,81,83,170,16,29,72,18,173,55,222,241,117,64,51,144,196,5,55,179,107,184,144,121,137,136,194]}",
	"persistentIncognitoRndStorage": "",
	"storePersistentRnd": true,
	"persistentRndClearIntervalValue": 30,
	"persistentRndClearIntervalUnit": "days",
	"lastPersistentRndClearing": 1713521163822,
	"sharePersistentRndBetweenDomains": true,
	"askOnlyOnce": "combined",
	"askDenyMode": "block",
	"showCanvasWhileAsking": true,
	"showNotifications": true,
	"highlightPageAction": "color",
	"highlightBrowserAction": "color",
	"displayBadge": true,
	"storeNotificationData": false,
	"storeImageForInspection": false,
	"ignoreList": "",
	"ignoredAPIs": {},
	"showCallingFile": false,
	"showCompleteCallingStack": true,
	"enableStackList": false,
	"stackList": "",
	"protectAudio": true,
	"audioFakeRate": "10%",
	"audioNoiseLevel": "medium",
	"useAudioCache": true,
	"audioUseFixedIndices": true,
	"audioFixedIndices": "6",
	"historyLengthThreshold": 2,
	"protectWindow": true,
	"allowWindowNameInFrames": true,
	"protectDOMRect": true,
	"domRectIntegerFactor": 4,
	"protectSVG": true,
	"protectTextMetrics": true,
	"blockDataURLs": true,
	"protectNavigator": true,
	"navigatorDetails": {
		"browserPreset": "Chrome",
		"appVersion": "5.0 ({platformDetails}) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/{chromeVersion} Safari/537.36",
		"buildID": "{undefined}",
		"oscpu": "{undefined}",
		"productSub": "20030107",
		"userAgent": "Mozilla/{appVersion}",
		"osPreset": "Windows",
		"windowManager": "Windows",
		"platform": "Win32",
		"platformDetails": "Windows NT 10.0; Win64; x64",
		"chromeVersion": "111.0.0.0",
		"vendor": "Google Inc."
	},
	"protectScreen": true,
	"screenSize": "",
	"fakeMinimalScreenSize": false,
	"displayAdvancedSettings": true,
	"displayDescriptions": true,
	"theme": "default",
	"showPresetsOnInstallation": true,
	"dontShowOptionsOnUpdate": false,
	"disruptSessionOnUpdate": false,
	"updatePending": false,
	"isStillDefault": false,
	"storageVersion": 1
}

[satonotdead]

Workaround on #710 (and posible duplicate)

[kkapsner]

That's quite weird. I'm able to reproduce the problem in a normal window but not in private mode...

It is not related to the navigator protection itself as it works if you chose another OS. So I guess they are using some chrome specific feature and fail... nothing where I can change anything.

If you whitelist challenges.cloudflare.com for the navigator API it works.

Pretending to use a different browser than you are can be detected very easily via feature testing.

[JobcenterTycoon]

For me it works fine now with default config + "hard to detect" mode without any exceptions.