Can't sign in to bit.ly using Firefox 129.0.2 on Windows 10

[PaulFrame-85]

What page is this happening on
Copy the URL of the page this issue is happening on.
https://ga-dev-tools.google/ga4/campaign-url-builder/
https://bitly.com/oauth/authorize?client_id=70e3a2804f36daeec48079ca7213aee795c7e76b&redirect_uri=https://ga-dev-tools.google/bitly-auth

Describe the bug
A clear and concise description of what the bug is.

Can't sign in to bit.ly using Firefox 129.0.2 on Windows 10

To Reproduce
Steps to reproduce the behavior:

1. Go to https://ga-dev-tools.google/ga4/campaign-url-builder/
2. Click on "shorten link" button
3. Scroll down to Sign In to bit.ly and
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Expected to happen: Window closes and I'm able to create shorterned tracking links linked to my Bit.Ly account.

Screenshots
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Desktop (please complete the following information):

• OS: Windows 10
• Browser Firefox
• Version 129.0.2

Additional context
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