A 64bit Firefox will come, but there are much higher priorities at this time than releasing that. Also, 64bit doesn't help as much as you think it does. If you are having trouble with slow startup, please try the steps at Firefox takes a long time to start up

i didn't lie that nightly 64bit run speed was about 2x of beta run speed.

run speed means opening Firefox at first.

if you think i say lie please read:

64-bit Chrome finally available to download: Faster, more secure, twice as stable | ExtremeTech : http://www.extremetech.com/computing/188741-64-bit-chrome-finally-available-to-download-faster-more-secure-twice-as-stable

Does Mozilla plans to release 64bit version with Electrolysis (multi-process architecture) with Firefox 36 ? or earlier?

Multi-process Firefox isn't related to 64-bit. Firefox will become 64-bit someday, but there is no roadmap at this time.

Thanks Tyler. Multi-processing also can enhance Firefox speed and performance. i tested. Still is unstable. performance of multi-tab browsing.

Multi-process Firefox is still in testing, but by the time it's released it will be ready. It won't be released until it's ready.

The 64 bit Nightly builds for Windows are only generated to test for compilation errors and do not undergo all the tests that other builds get, so the risk that something goes wrong can be quite high.

There is still a lot work to be done with Electrolysis (e10s)

• Bug 653064 - (fxe10s) e10s front-end tasks tracking bug
• Bug 879538 - (core-e10s) e10s back-end tasks tracking bug