We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Did Mozilla really discontinued Firefox x64?

more options

Hi there,

I'm currently using Waterfox which is a x64 bit optimized version of Firefox. I wanted to ask if Mozilla really discontinued its Firefox x64 project because I'd really enjoy such a browser. Like Waterfox says "64 bit is the future". We could get huge performance increases with a x64 bit optimized version.

Unfortunately Waterfox is really slow at updating right now and we are a bit behind Firefox here.

Thanks!

Hi there, I'm currently using Waterfox which is a x64 bit optimized version of Firefox. I wanted to ask if Mozilla really discontinued its Firefox x64 project because I'd really enjoy such a browser. Like Waterfox says "64 bit is the future". We could get huge performance increases with a x64 bit optimized version. Unfortunately Waterfox is really slow at updating right now and we are a bit behind Firefox here. Thanks!

Chosen solution

No Mozilla did not discontinue Win64 builds and they did not really exist for release anyways.

When Mozilla announced they were planning to put development of Win64 Firefox on hiatus back in November many sites incorrectly took that as being axed or discontinued.

They have however made the Win64 builds development less of a priority in last while as they were downgraded from Tier-2 to Tier-3 builds while official builds (Win32, Mac OSX 64/32 and Linux 64/32) are Tier-1. https://developer.mozilla.org/en-US/docs/Supported_build_configurations

Read this answer in context 👍 2

All Replies (10)

more options

Waterfox is an independent project. It's not up to Mozilla to continue or discontinue it.

Sorry, misread your question.

The Bugzilla tracking system still shows activity on resolving over a dozen bugs that stand in the way of 64-bit build for Windows. Considering the number of issues, I wouldn't expect it any time soon.

Modified by jscher2000 - Support Volunteer

more options

Chosen Solution

No Mozilla did not discontinue Win64 builds and they did not really exist for release anyways.

When Mozilla announced they were planning to put development of Win64 Firefox on hiatus back in November many sites incorrectly took that as being axed or discontinued.

They have however made the Win64 builds development less of a priority in last while as they were downgraded from Tier-2 to Tier-3 builds while official builds (Win32, Mac OSX 64/32 and Linux 64/32) are Tier-1. https://developer.mozilla.org/en-US/docs/Supported_build_configurations

Modified by James

more options

Could you give me the link for this Bugzilla section jscher, please?

more options

This is Bugzilla: https://bugzilla.mozilla.org/

more options

Thank you! But where can you view all existing reports and look which has been fixed and which not? I can't find it.

more options

This is the one that shows the remaining open bugs: 471090 – (tracking_win64) [meta] Windows x64 build tracking bug. Or was it this one with a slightly different list: 558448 – (support-win64) [Tracking bug] officially support Windows 64-bit builds.

Before commenting on Bugzilla, consider: Bugzilla Etiquette.

Modified by jscher2000 - Support Volunteer

more options

Alright, thank you very much! BTW. have you already took a look at Google Images with the newest Firefox? In the current Waterfox and FF x64 version Firefox stuck when I quickly scroll down the page. When I do it very slow it's more or less smooth. And sometimes Firefox even stops working for a few seconds.

My hardware's pretty good and in other browsers doesn't happen. Any info about that?

more options

On Google images, I can definitely get ahead of the image loading and then Firefox or Google won't always let me scroll smoothing through the placeholders. The scroll wheel seems to be particularly effected, perhaps because Google is firing mouseover events in addition to retrieving new images. But I don't really have a good way to compare with Firefox 19.

more options
more options

I run Linux Mint 64Bit with Firefox 20 64Bit, I am unsure about Windows it sounds like it has just been delayed please be patient with our development team :)