Bugzilla

(In reply to Simon Giesecke [:sg] [he/him] from comment #22)
> 
> `JavaScript error: http://127.0.0.1/, line 31: ReferenceError: FuzzingFunctions is not defined` probably means that `fuzzing.enabled` is not set to `true`.
> 
> I'm not sure what causes: `JavaScript error: http://127.0.0.1/, line 33: TypeError: e2.waitUntil is not a function`, but that was already happening in the original execution, so that's expected.

Thank you, Simon! 
Verified again with  81.0a1(20200813213942), 80.0b8 (20200813191622), 68.12esr (20200813214232) and 78.2.0esr (20200813212801) on Ubuntu 18.04 and there are no tab crashes while loading the test case with `dom.fetchObserver.enabled` and `fuzzing.enabled` prefs enabled.

(In reply to Simon Giesecke [:sg] [he/him] from comment #22)
> 
> `JavaScript error: http://127.0.0.1/, line 31: ReferenceError: FuzzingFunctions is not defined` probably means that `fuzzing.enabled` is not set to `true`.
> 
> I'm not sure what causes: `JavaScript error: http://127.0.0.1/, line 33: TypeError: e2.waitUntil is not a function`, but that was already happening in the original execution, so that's expected.

Thank you, Simon! 
Verified again with  81.0a1(20200813213942), 80.0b8 (20200813191622), 68.12esr (20200813214232) and 78.2.0esr (20200813212801) on Ubuntu 18.04 and there are no tab crashes while loading the test case with `dom.fetchObserver.enabled` and `fuzzing.enabled` prefs set on true.