pptr.dev broken when in firefox incognito tab

[baslr]

Navigated to https://pptr.dev/
InvalidStateError: A mutation operation was attempted on a database that did not allow mutations.
The resource at “https://www.google-analytics.com/analytics.js” was blocked because content blocking is enabled.
pptr.dev
QuotaExceededError: The quota has been exceeded.

[xpetit]

Same here :/