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It can auto decline the canvas request and return fake image data from the API by default when privacy.resistFingerprinting is enabled. privacy.resistFingerprin

• gruez 4y ago
  >It can auto decline the canvas request and return fake image data from the API by default when privacy.resistFingerprinting is enabled. privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts must be set to false to always show the popup Right, it can auto-decline it in certain circumstances. As the name suggests, it auto-declines it when there there isn't any user input. That seems fairly reasonable to me, and is unlikely to cause issues with you uploading documents for a visa application (you need to interact with the site to upload the document in the first place). That said, I was playing around with it using various codepen demos and discovered that even if you interacted with the page, if the page was in an iframe it would always not show the popup. That might cause issues in certain circumstances and I do hope it will get fixed. >and even then they shouldn't serve fake data when the user declines the request, but throw an error for the API call. Whether that's the best approach is debatable. For the use case of uploading a document, I agree that would be the best behavior, but for other cases (ie. it's trying to display something), an exception would likely crash the app. In many cases (eg. google maps), the garbage data doesn't interfere with my use of the app, and crashing the app would be far more disruptive.