Canvas farbling doesn't happen in disconnected iframes

[pilgrim-brave]

No description provided.

[GeetaSarvadnya]

@pilgrim-brave Can you please link the test plan?

[LaurenWags]

cc @pes10k on #12303 (comment)

[pilgrim-brave]

Test plan:

1. Visit https://canvasblocker.kkapsner.de/test/test.html
2. In Brave Shields panel, change Fingerprinting to "Allow all fingerprinting"

Each test shows two hash values. For the purposes of this plan, only look at the second hash value of each test (after the "/")

If any test shows an error like "Error while computing: Blocked a frame with origin "https://canvasblocker.kkapsner.de" from accessing a cross-origin frame." then refresh the page until the error message disappears.

3. Hash for "iFrame Test. Thanks to DocumentRoot.", "iFrame Test 2 - with URL", "iFrame Test 3 - violating SOP", "iFrame Test 4 - different access 1", "iFrame Test 5 - different access 2", and "iFrame Test 6 - different access 3" should all be the same value. Note this hash value.
4. In Brave Shields panel, change Fingerprinting to "Blocked (standard)"

Again, if any test shows an error like "Error while computing: Blocked a frame with origin "https://canvasblocker.kkapsner.de" from accessing a cross-origin frame." then refresh the page until the error message disappears.

5. Hash for the six tests listed in step 3 should all be the same value, but it should be a different value than the hash seen in step 3.

[GeetaSarvadnya]

Verification is passed on

Brave | 1.18.69 Chromium: 87.0.4280.88 (Official Build) (64-bit)
-- | --
Revision | 89e2380a3e36c3464b5dd1302349b1382549290d-refs/branch-heads/4280@{#1761}
OS | Windows 10 OS Version 2004 (Build 19041.630)

• Verified the test plan from Canvas farbling doesn't happen in disconnected iframes #12303 (comment)

Shiled Fingerprinting to "Allow all fingerprinting"

iFrame Test. Thanks to DocumentRoot

iFrame Test 2 - with URL

iFrame Test 3 - violating SOP

iFrame Test 4 - different access 1

iFrame Test 5 - different access 2

iFrame Test 6 - different access 3

Fingerprinting to "Blocked (standard)"

iFrame Test. Thanks to DocumentRoot

iFrame Test 2 - with URL

iFrame Test 3 - violating SOP

iFrame Test 4 - different access 1

iFrame Test 5 - different access 2

iFrame Test 6 - different access 3

---

• Verified the test plan from Canvas farbling doesn't happen in disconnected iframes #12303 (comment)

Shiled Fingerprinting to "Allow all fingerprinting"

Fingerprinting to "Blocked (standard)"