Description
🚀 Feature Request
Last year there was a commit that set the Firefox user preference key "network.cookie.cookieBehavior" to 4. However, the default value in Firefox since 2023 is 5. When the key is set to 4 instead, the cookies are not partitioned by top-level site. I would suggest using the Firefox default value of 5 instead of overriding it to 4 as storage partitioning is a standard practice in all major browsers at this time.
Example
No response
Motivation
Storage partitioning is a standard practice in all major browsers at this time. Therefore, if the value is overridden to 4 by default in Playwright, this might lead to wrong results when it comes to privacy research, as well as web application testing as the results might differ from real-world scenarios where storage partitioning is often used by default.