Hi, copy and paste the next about:buildconfig in your location bar, and see the "Build platform" in "target" probably it is ....32 because 41 firefox does not yet exist in windows as 64bit, only in beta (42 now) exist the 64-bit, see the beta : https://www.mozilla.org/en-US/firefox/beta/all/

see the stable relase (41.0.1 now) : https://www.mozilla.org/en-US/firefox/all/

thank you

Hi

I have had a look at the user agent details for your version of Firefox and it states that you are using a 64bit version of Windows, but that Firefox is making use of a subsystem called WoW64 that allows it to run a 32bit version of software like Firefox.

There is currently no Release version of 64bit Firefox, but there is a version that is in Beta (you can download from here) and in the Firefox Developer Edition (you can download from here). Please note that these are not fully finished versions of Firefox so you may encounter one or two issues that would otherwise be corrected before the code moves to Release.

I hope this helps, but if not, please come back here and we can look into a different solution for you.