Firefox 4 does work on 64 bit Windows 7.

Firefox 4 is a 32 bit application but it works on 64 bit Windows.

Thanks! But all addons like personas, flash will work? Then Internet Download Manager plug in will also be supported? Actually i have many plugins. Thats why i am a bit worried.

Personas will work, extensions such as Internet Download Manager should also work. With plugins you need to install the 32 bit version of the plugin. The 32 bit version of Flash works with Firefox on 64 bit Windows.

i don't think it works on 64-bit Win7. at least not after the first instance. once an instance is shutdown Win7 complains that a process is still running. but TaskMgr has no record of it.

"i don't think it works on 64-bit Win7. at least not after the first instance. once an instance is shutdown Win7 complains that a process is still running. but TaskMgr has no record of it"

I have the exact same problem Would love to know when there are updates for the issue

Thanks :)