Turn out the lights, the 64-bit Firefox party is over. After developers discussed the topic in a somewhat lengthy thread, Mozilla has decided to shelve any and all work related to 64-bit versions of the Firefox browser. That includes nightly and hourly releases. Developer Benjamin Smedberg first proposed the idea of ceasing 64-bit development due to the builds being "a constant source of misunderstanding and frustration."
Smedberg pointed out that many plugins are not available in 64-bit builds of Firefox, and the ones that are often don't work correctly or frequently crash because they haven't been implemented correctly.
"This is frustrating for users because feel (and are!) second-class. It is also frustrating for the stability team triage because crash-stats does not easily distinguish between 32-bit and 64-bit builds... For this reason, I would like to propose that we disable the 64-bit Windows nightly builds... I also think we should consider disabling the Win64 builders completely," Smedberg said.
Not everyone who participated in the discussion agreed with Smedberg's proposal, though enough of them did that Mozilla decided now is not the time to pursue 64-bit development.