* Session history is not tracked for cross-site iframes.
* Session restore occasionally fails to restore page state, such as page zoom, scroll offset, or form data.
* DevTools support for cross-site iframes with fission is incomplete([https://wiki.mozilla.org/DevTools/Fission read more]).
* Attempting to debug extensions or workers from a non-fission window can cause crashes.
* Linux resource exhaustion issues with large tab counts, including: