That's because there were none. All bugs came with verifiable testcases (crash tests) that crashed the browser or the JS shell.
For the JS shell, similar to fuzzing, a small fraction of these bugs were bugs in the shell itself (i.e. testing only) - but according to our fuzzing guidelines, these are not false positives and they will also be fixed.
[working for Mozilla]
That's because there were none. All bugs came with verifiable testcases (crash tests) that crashed the browser or the JS shell.
For the JS shell, similar to fuzzing, a small fraction of these bugs were bugs in the shell itself (i.e. testing only) - but according to our fuzzing guidelines, these are not false positives and they will also be fixed.