How to enable cross-origin isolation for WebExtensions

I want to use to measure performance of an extension, but its resolution is limited to 1ms due to cross-origin isolation restrictions. MDN says we need to enable cross-origin isolation to use such features, but how to do this for WebExtensions?

Watchout for over-optimizations :slight_smile:.
If something takes only few ms to execute, it may not be worth to optimize.

In any case, you can improve precision by re-executing the test case in series (unless there is some caching involved).

Oh, and I just read about similar topic in the new Nightly news: