Canvasblocker intercepting calls from proxy object to .innerHTML in website without a single <canvas> element

[TheGhostOfInky]

Description

I am the developer of an open source test called ideosorter and I noticed canvasblocker causes the test to stop loading the localized frontend.

Expected Behaviour

I expected firefox to load the page as it does without canvasblocker, as I am the developer of the site and can confirm it has 0 canvas elements, much less tracking ones.

Current Behaviour

The following happens:

Possible Solution

Unfortunately I am not familiar enough with canvasblocker's codebase to know of a solution.

Steps to Reproduce (for bugs)

1. create a fresh Firefox profile
2. install canvasblocker and select stealth settings
3. navigate to https://ideosorter.pages.dev/
4. get an error message and see the UI plastered with undefined

Context

I tried logging the values and the localization strings are always working, the faulty interception seems to happen when the strings are attached to an HTML element's innerHTML property, innerText is not affected and recreating the string (by splitting it into characters and rejoining) bypasses the fault.

Your Environment

• CanvasBlocker Version used: 1.10.1
• Firefox version incl. 32- or 64-bit: 64-bit
• Operating System and version (desktop or mobile): Windows 11 x64
• Installed addons: CanvasBlocker only

Your Settings

<!--- Copy your CanvasBlocker settings here. -->
<!-- They can be retrieved by checking the expert mode and going to export settings. -->
<!--- You may consider deleting personal data - especially the "persistentRndStorage". -->
{
	"logLevel": 1,
	"urlSettings": [],
	"hiddenSettings": {},
	"expandStatus": {},
	"displayHiddenSettings": true,
	"whiteList": "",
	"sessionWhiteList": "",
	"blackList": "",
	"blockMode": "fake",
	"protectedCanvasPart": "input",
	"minFakeSize": 10,
	"maxFakeSize": 0,
	"rng": "persistent",
	"protectedAPIFeatures": {},
	"useCanvasCache": true,
	"ignoreFrequentColors": 3,
	"minColors": 3,
	"fakeAlphaChannel": false,
	"webGLVendor": "",
	"webGLRenderer": "",
	"webGLUnmaskedVendor": "",
	"webGLUnmaskedRenderer": "",
	"persistentRndStorage": "{}",
	"persistentIncognitoRndStorage": "",
	"storePersistentRnd": true,
	"persistentRndClearIntervalValue": 0,
	"persistentRndClearIntervalUnit": "days",
	"lastPersistentRndClearing": 1718608514842,
	"sharePersistentRndBetweenDomains": false,
	"askOnlyOnce": "individual",
	"askDenyMode": "block",
	"showCanvasWhileAsking": true,
	"showNotifications": true,
	"highlightPageAction": "none",
	"highlightBrowserAction": "color",
	"displayBadge": true,
	"storeNotificationData": false,
	"storeImageForInspection": false,
	"ignoreList": "",
	"ignoredAPIs": {},
	"showCallingFile": false,
	"showCompleteCallingStack": false,
	"enableStackList": false,
	"stackList": "",
	"protectAudio": true,
	"audioFakeRate": "100",
	"audioNoiseLevel": "minimal",
	"useAudioCache": true,
	"audioUseFixedIndices": true,
	"audioFixedIndices": "20",
	"historyLengthThreshold": 2,
	"protectWindow": false,
	"allowWindowNameInFrames": false,
	"protectDOMRect": true,
	"domRectIntegerFactor": 4,
	"protectSVG": true,
	"protectTextMetrics": true,
	"blockDataURLs": true,
	"protectNavigator": false,
	"navigatorDetails": {},
	"protectScreen": true,
	"screenSize": "",
	"fakeMinimalScreenSize": false,
	"displayAdvancedSettings": true,
	"displayDescriptions": false,
	"theme": "auto",
	"showPresetsOnInstallation": true,
	"dontShowOptionsOnUpdate": false,
	"disruptSessionOnUpdate": false,
	"updatePending": false,
	"isStillDefault": false,
	"storageVersion": 1
}