[phasmantistes]

Keep in mind the perspective of the people trying to ship Firefox:

* The bug does not break the vanilla (and therefore vast majority of userbase) firefox experience

* The bug is easily worked-around (as opposed to completely unfixable)

* The release candidates were already being built (which means you don't want to make changes, because you have to rebuild+resend to manual QA+resign)

* The bug was merged in as part of a security fix which they can't risk touching

They're not necessarily out of touch. It could easily be that people who didn't have all the details (e.g. release managers who didn't realize the fix was re-adding a single trivial file) were worried about the risks of upsetting a security release.

Sometimes it takes time for the severity of a regression to work its way up to a decision maker. And in the end they did exactly the right thing, with 5 separate people all putting in work on a weekend to make it right.