Is my Firefox 64bit? v45.02
Firefox always on automatic update: is 64bit automatically installed?
Chosen solution
User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0
The WOW64 in your useragent shows it is a 32-bit application running on 64-bit Windows.
If you download from www.mozilla.org you should get the 32-bit version for Windows so if you want the Win64 Firefox go to the Systems & Languages link www.mozilla.org/firefox/all/
Also Windows users using 32-bit Firefox will not get a update to 64-bit (Win64) Firefox, at least probably not until 32-bit Windows version of Firefox is perhaps dropped in future. This would mean support for WinXP, Vista, and 2003/2008 servers would be dropped then.
Also you need 64-bit Windows 7, 8 (8.1), 10 to use Win64 Firefox.
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The standard release of Firefox for Windows is the 32-bit release. You can optionally replace it with the 64-bit release, but if you use any plugins other than Flash and Silverlight, unfortunately those will not work in the 64-bit release.
Chosen Solution
User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0
The WOW64 in your useragent shows it is a 32-bit application running on 64-bit Windows.
If you download from www.mozilla.org you should get the 32-bit version for Windows so if you want the Win64 Firefox go to the Systems & Languages link www.mozilla.org/firefox/all/
Also Windows users using 32-bit Firefox will not get a update to 64-bit (Win64) Firefox, at least probably not until 32-bit Windows version of Firefox is perhaps dropped in future. This would mean support for WinXP, Vista, and 2003/2008 servers would be dropped then.
Also you need 64-bit Windows 7, 8 (8.1), 10 to use Win64 Firefox.
Modified by James