4

I tried to download the setup file at this link, but during installation process, I notice it still goes to folder Programs (x86), so I assume it still a 32 bit version.

Have anyone succeeded upgrade your browser, please show me how?

  • 3
    if the process is 64-bit why does it matter where it is installed? – Ramhound Dec 24 '15 at 17:06
  • Yes it doesn't matter. It is the first time I saw they point 64bit program to 32bit folder by default, so I just thought I got the wrong setup file. – Hp93 Dec 24 '15 at 17:15
  • 2
    open task manager to see if it's 32 or 64-bit version – phuclv Dec 25 '15 at 2:53
10

Firefox 64-bit installs to the same folder. This will upgrade your Firefox to the 64-bit version.

Additionally, you can check your version by going to about:buildconfig. Under Build platform, the target should start with x86_64 for 64-bit. 32-bit is i686

14

I notice it still goes to folder Programs (x86)

This is a bug in the first release of the 64 bit version:

The installer will upgrade Firefox to the 64-bit version but install it to C:\Program Files (x86), breaking Windows conventions of installing 64-bit applications to C:\Program Files.

Source How to tell if Firefox is 32-bit or 64-bit


I assume it still a 32 bit version.

There are several ways to tell which version you have. See below.


How to tell if Firefox is 32-bit or 64-bit

Mozilla published the Windows 64-bit installer for Firefox to the Download page with yesterday’s release of Firefox 43.0. You must have a 64-bit version of Windows to take advantage of the new version of the browser.

There are two cosmetic bugs with the 64-bit version of Firefox that have been posted for a while without resolution.

  • The first bug addresses installing the 64-bit bit version of Firefox when you have an existing 32-bit version installed. The installer will upgrade Firefox to the 64-bit version but install it to C:\Program Files (x86), breaking Windows conventions of installing 64-bit applications to C:\Program Files.

  • The second bug is asking for a designation of which bit browser you are using in Firefox’s Help, About.

Since both of those bugs make it difficult to tell which version of the browser you are using, here are two different ways to identify 32-bit vs 64-bit Firefox. User Agent

In Firefox type about:support into the address bar. This will open up a page with a lot of information about your browser. From the User Agent line under Application Basics, you can see if this is the 32-bit version or 64-bit version running.

The 32-bit Firefox running on a 64-bit Windows 8.1 shows WOW64 in the User Agent.

firefox43_x86

The 64-bit Firefox running on a 64-bit Windows 8.1 shows Win64; x64.

firefox43_x64

The 32-bit Firefox running on a 32-bit Windows will not include the Win64; x64 in the user agent.

Programs and Features

Another place that you can check is the Control Panel, Programs and Features. To uninstall a program, you can see the software name listed.

The 32-bit Firefox is listed as Mozilla Firefox 43.0 (x86 en-US).

firefox43_x86_programs

The 64-bit Firefox is listed as Mozilla Firefox 43.0 (x64 en-US).

firefox43_x64_programs

Source How to tell if Firefox is 32-bit or 64-bit

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