Canvas Defender for Pale Moon?

fatboy · Unread post by **fatboy** » 2018-04-18, 19:07

Good Day Community,

I am very interested in online privacy/security and from what I can gather is by using one's canvas fingerprint makes for quite a successful way of tracking a user across the internet, even though one has cookie/ad blockers installed?
Is this true?
If so, do you think Pale Moon needs a Canvas defender add-on like the one below?

https://addons.mozilla.org/en-US/firefo ... src=search

What I like about this add-on is that it changes your Canvas Fingerprint every x minutes.

I know Pale Moon has an agent switcher, which I use and love, but am I understanding canvas tracking correctly and should I be concerned about canvas fingerprint tracking?

Thank You and keen to hear what you guys think.

Moonraker · Unread post by **Moonraker** » 2018-04-18, 19:10

There is also an about:config entry."canvas.poisondata" which can be set to true.

fatboy · Unread post by **fatboy** » 2018-04-19, 03:07

Moonraker wrote:There is also an about:config entry."canvas.poisondata" which can be set to true.

Awesome! What exactly does this config do?

Unread post by **adesh** » 2018-04-19, 04:24

"It changes your canvas fingerprint every time you check."

fatboy · Unread post by **fatboy** » 2018-04-19, 08:38

You check what?

Unread post by **Moonchild** » 2018-04-19, 11:00

fatboy wrote:
Moonraker wrote:There is also an about:config entry."canvas.poisondata" which can be set to true.
Awesome! What exactly does this config do?

What it does exactly is introduce humanly-imperceptible random noise in visual data retrieved from canvases. So each time a tracker reads the image data to find out if the rendering of certain elements is telling it something about the browser in use, it will come back with a unique image (or checksum/fingerprint thereof).

fatboy · Unread post by **fatboy** » 2018-04-19, 16:22

What it does exactly is introduce humanly-imperceptible random noise in visual data retrieved from canvases. So each time a tracker reads the image data to find out if the rendering of certain elements is telling it something about the browser in use, it will come back with a unique image (or checksum/fingerprint thereof).

Oh jeez, this is perfect! Thank you! Amazing!

cdlvcdlv · Unread post by **cdlvcdlv** » 2018-04-20, 08:33

According to this article, that kind of strategy makes you more easily identifiable.

How Canvas Fingerprint Blockers Make You Easily Trackable

Unread post by **Moonchild** » 2018-04-20, 12:54

cdlvcdlv wrote:According to this article, that kind of strategy makes you more easily identifiable.
How Canvas Fingerprint Blockers Make You Easily Trackable

Sorry, but the article is wrong.

I don't have the time or energy right now to give you a detailed explanation why randomized fingerprints are an effective method (I've already explained some of that when I first implemented it) and why the proposed method in that article is absolutely worse, but some key statements to set you on the right track in your own research: trackers are normally third-party so will not have any linked information to active navigation, any sort of tracking match (even temporarily) will paint a much larger label on you, non-matching fingerprints provide no information about the source IP's nature (shared or not, etc.), and random fingerprints will not only make your visits harder to track, but will also make the data for non-randomized visitors useless, and as a bonus trackers will have to store random fingerprints to even be able to filter (while blanking can just be discarded immediately) giving them lots of useless data.

Sampei Nihira · Unread post by **Sampei Nihira** » 2018-04-20, 13:35

The internal setting of Pale Moon v.27 will not protect you from other types of fingerprinting.
[Removed]

Mod. Edit: removed the off-topic, Canvas fingerprinting is tricky enough to understand without going off on a tangent.

Fedor2 · Unread post by **Fedor2** » 2018-04-21, 20:57

Hey, what are talking about.?
That canvas poison thing is unique in the palemoon, I examined it and are to say it is good and available in about:config, i even set it true on my unofficial rus portable build.
Check there?
https://browserleaks.com/canvas

of course make a reload page there and be convinced of the canvas value is change every time, what is the goal of canvas poisoning.

Though I not good in english language, one who is good can decorated that better.

cdlvcdlv · Unread post by **cdlvcdlv** » 2018-04-27, 11:38

Moonchild wrote:
cdlvcdlv wrote:According to this article, that kind of strategy makes you more easily identifiable.
How Canvas Fingerprint Blockers Make You Easily Trackable
Sorry, but the article is wrong.(...)

Thanks for the explanation and the hints. I don't fully understand the meaning of some concepts (like "active navigation") but I will dig into it.

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