Unable to login to GoDaddy control panel

[ProactiveServices]

Cannot login to GoDaddy control panel with add-on enabled.

Description

When trying to login to the GoDaddy control panel (ugh) I get a pop-up telling me
"Your browser is a bit unusual. Try disabling ad blockers and other extensions, enabling javascript, or using a different web browser"
Using a fresh Firefox profile and only installing CanvasBlocker, using default settings reproduces the problem. With CanvasBlocker disabled, login is successful.

Expected Behavior

Able to login to GoDaddy control panel
Die a little inside that my customer is using GoDaddy

Current Behavior

Login attempts result in web page reporting that it's unable to login due to an adblocker, javascript or browser fault.

Possible Solution

Convince customer to move to a reputable web host

Steps to Reproduce (for bugs)

1. Visit https://www.godaddy.com/
2. Click "Sign In" from top-right
3. Click "Sign In" link
4. Enter valid login details

Context

Tried with a new Firefox profile and installed only CanvasBlocker.

Your Environment

• Firefox 64-bit 97.0.2 on Kubuntu 20.04
• CanvasBlocker 1.8
• No other addons

Your Settings

Default settings.

[kkapsner]

Can you log in if you whitelist GoDaddy?
Which APIs are protected when visiting the control panel?

[kkapsner]

It seems it's the screen API (outerHeight specifically). You can whitelist godaddy for that API and you will be able to log in.

But I have to dig deeper what happens there. Apart of a small bug I found in the code I have to dig deeper to see what they are doing exactly.

[ProactiveServices]

Yup I see the same here. Oddly when I was first looking into this, whitelisting didn't appear to work. It does now.

[kkapsner]

Their fingerprinting code is highly obfuscated - so no luck until now how they detect that the outerWidth and outerHeight are faked.