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Two versions of firefox on computer - How do I get rid of one?

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I just noticed that I have an old (63.0.3) and a new (66.0.3) version of Firefox on my computer. I have no idea when or how this happened. Seems to work fine at the moment.

One is Mozilla Firefox 63.0.3 (x64 en-US) (170 MB). One is Mozilla Firefox 66.0.3 (x64 en-US) (175 MB). So my guess is this happened a while ago.

Both show up when I look at Apps & Features. Both are listed in Revo uninstaller.

There are two identical Firefox icons.

If I open one and check the version number in the program, it does show a different number depending on which icon I clicked to open the program. So there are definitely two versions.

They are sharing information. They open the same pages in several tabs that I had open when I closed the the program the last time.

I want to get rid of one but don't want to lose my many settings, bookmarks, etc. I don't want to risk everything by just Uninstalling the old version, unless I can be sure that it is safe.

Everything on my HP-PC is up to date.

Any ideas? Thanks!

I just noticed that I have an old (63.0.3) and a new (66.0.3) version of Firefox on my computer. I have no idea when or how this happened. Seems to work fine at the moment. One is Mozilla Firefox 63.0.3 (x64 en-US) (170 MB). One is Mozilla Firefox 66.0.3 (x64 en-US) (175 MB). So my guess is this happened a while ago. Both show up when I look at Apps & Features. Both are listed in Revo uninstaller. There are two identical Firefox icons. If I open one and check the version number in the program, it does show a different number depending on which icon I clicked to open the program. So there are definitely two versions. They are sharing information. They open the same pages in several tabs that I had open when I closed the the program the last time. I want to get rid of one but don't want to lose my many settings, bookmarks, etc. I don't want to risk everything by just Uninstalling the old version, unless I can be sure that it is safe. Everything on my HP-PC is up to date. Any ideas? Thanks!

Chosen solution

Success!

It was super simple but I'm glad I took all precautions. I copied the profile to a flash drive and then uninstalled FF 63.

FF 66 was still fully 100% intact, as you predicted.

I wouldn't have dared attempt this without guidance. It took hours to research this and less than a minute to do it.

THANK YOU again.

Frank

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Additional System Details

Installed Plug-ins

  • Shockwave Flash 32.0 r0

Application

  • Firefox 66.0.3
  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0
  • Support URL: https://support.mozilla.org/1/firefox/66.0.3/WINNT/en-US/

Extensions

  • Adblock Plus - free ad blocker 3.5.1 ({d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d})
  • Mailvelope 2.2.2 (jid1-AQqSMBYb0a8ADg@jetpack)
  • Avast Online Security 18.4.140 (wrc@avast.com) (Inactive)
  • Avast SafePrice | Comparison, deals, coupons 19.1.1344 (sp@avast.com) (Inactive)

Javascript

  • incrementalGCEnabled: True

Graphics

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  • adapterDeviceID2:
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  • driverDate: 2-12-2019
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  • webgl1Version: OpenGL ES 2.0 (ANGLE 2.1.0.eff6bfdb1db9)
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  • webgl2Extensions: EXT_color_buffer_float EXT_texture_filter_anisotropic EXT_disjoint_timer_query OES_texture_float_linear WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context
  • webgl2Renderer: Google Inc. -- ANGLE (NVIDIA GeForce GTX 745 Direct3D11 vs_5_0 ps_5_0)
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Modified Preferences

Misc

  • User JS: No
  • Accessibility: No

Question owner

If I open 66 first, it opens all the tabs from the last time I closed it. If I then open 63, it only opens one tab. So maybe I should open 66, then uninstall 63?

If I open 66 first, it opens all the tabs from the last time I closed it. If I then open 63, it only opens one tab. So maybe I should open 66, then uninstall 63?
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FredMcD
  • Top 10 Contributor
4189 solutions 58498 answers

Firefox comes in three or more folders on all computers. They are;

Maintenance: (Programs Folder) <Windows Only> Firefox itself: (Programs Folder) And two folders in the profile of each user on the computer for each Firefox profile for that user.

If you remove the Firefox folder, the user profiles would not be affected.


It looks like both programs are accessing the same profile.

This is what you can do. Open the file explorer on your computer. Make your way to the OLD unwanted programs folder and remove it.

After rebooting the computer, run a registry scanner if you have one.

Firefox comes in three or more folders on all computers. They are; Maintenance: (Programs Folder) <Windows Only> Firefox itself: (Programs Folder) And two folders in the profile of each user on the computer for each Firefox profile for that user. If you remove the Firefox folder, the user profiles would not be affected. -------------- It looks like both programs are accessing the same profile. This is what you can do. Open the file explorer on your computer. Make your way to the OLD unwanted programs folder and remove it. After rebooting the computer, run a registry scanner if you have one.
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Frys 0 solutions 1 answers

I have had this same issue before, the way I use to solve this type of problems is using windows control panel then look for uninstall programs and uninstall the version you do not use. Caution: before doing this make sure you have a backup of your profile, then restart the computer. Reinstall the desired version of FF from mozilla.org and import your bookmarks and profile or sign in to synchronise to the mozilla foundation sync service.

If the problem persists, what you might need is to uninstall again and delete all FF ledges that exist under windows program files directory. Then repeat the afore mentioned procedure.

I have had this same issue before, the way I use to solve this type of problems is using windows control panel then look for uninstall programs and uninstall the version you do not use. Caution: before doing this make sure you have a backup of your profile, then restart the computer. Reinstall the desired version of FF from mozilla.org and import your bookmarks and profile or sign in to synchronise to the mozilla foundation sync service. If the problem persists, what you might need is to uninstall again and delete all FF ledges that exist under windows program files directory. Then repeat the afore mentioned procedure.

Modified by Frys

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cor-el
  • Top 10 Contributor
  • Moderator
17344 solutions 156782 answers

Helpful Reply

You should always confirm in such cases that the two versions are actually installed and that this is not about a leftover key in the Windows Registry that wasn't removed by the updater. In that case only one Firefox version is installed and removing the older version will remove the current release as well.

You should always confirm in such cases that the two versions are actually installed and that this is not about a leftover key in the Windows Registry that wasn't removed by the updater. In that case only one Firefox version is installed and removing the older version will remove the current release as well.
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Question owner

How do I check that? Can you give me step-by-step directions or tell me where to find them? Thanks.

How do I check that? Can you give me step-by-step directions or tell me where to find them? Thanks.
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Question owner

In Control Panel>Programs and Features>Uninstall, it shows

Mozilla Firefox 63.0.3 ((x64 en-US)...Mozilla...3/0/19...169 MB...63.0.3

Mozilla Firefox 63.0.3 ((x64 en-US)...Mozilla...4/11/19..175 MB...66.0.3

In Control Panel>Programs and Features>Uninstall, it shows Mozilla Firefox 63.0.3 ((x64 en-US)...Mozilla...3/0/19...169 MB...63.0.3 Mozilla Firefox 63.0.3 ((x64 en-US)...Mozilla...4/11/19..175 MB...66.0.3
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cor-el
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17344 solutions 156782 answers

That would be inspecting this key in the Windows Registry with the registry editor and check Mozilla Firefox keys.

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\
That would be inspecting this key in the Windows Registry with the registry editor and check Mozilla Firefox keys. *HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\
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Question owner

Using the registry editor, it shows:

Mozilla

Mozilla Firefox 
  -66.0.3 (x64 en-US) 
  -- Main
  -- Uninstall 

mozilla.org

-Mozilla
  (name)                (type)               (Data)
 (Default)              REG_SZ                  (value not set)
 CurrentVersion   REG_SZ                   66.0.3

So I see no entry for 63.0.3.

Using the registry editor, it shows: Mozilla Mozilla Firefox -66.0.3 (x64 en-US) -- Main -- Uninstall mozilla.org -Mozilla (name) (type) (Data) (Default) REG_SZ (value not set) CurrentVersion REG_SZ 66.0.3 So I see no entry for 63.0.3.

Modified by ezwrite

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Question owner

There's also this:

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox 66.0.3 (x64 en-US)

There's also this: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox 66.0.3 (x64 en-US)
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cor-el
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17344 solutions 156782 answers

There should be a key present that shows the installation path of each item. If the installation path is the same directory for both Firefox versions then it is likely a leftover key and you can remove this uninstall key.

There should be a key present that shows the installation path of each item. If the installation path is the same directory for both Firefox versions then it is likely a leftover key and you can remove this uninstall key.
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Question owner

I don't see 63.0.3 anywhere. Where should I look?

I don't see 63.0.3 anywhere. Where should I look?
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cor-el
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17344 solutions 156782 answers

If there is no key for Firefox 63.0.3 then you can ignore it. You can check if there is a similar key in HKEY_CURRENT_USER.

  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox
If there is no key for Firefox 63.0.3 then you can ignore it. You can check if there is a similar key in HKEY_CURRENT_USER. * HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox
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Question owner

Yes, it's here!

Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox 63.0.3 (x64 en-US)

Now what?

Yes, it's here! Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox 63.0.3 (x64 en-US) Now what?
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cor-el
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17344 solutions 156782 answers

If there is a path key present then you can check its value, otherwise you can probably just remove this key because this Firefox version got installed as a user and the updater may only be checking the keys in HKEY_LOCAL_MACHINE and not in HKEY_CURRENT_USER.

If there is a path key present then you can check its value, otherwise you can probably just remove this key because this Firefox version got installed as a user and the updater may only be checking the keys in HKEY_LOCAL_MACHINE and not in HKEY_CURRENT_USER.
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Question owner

How do I check its value? Like I said, not an expert!

How do I check its value? Like I said, not an expert!
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Question owner

Does that explain the two icons and the two entries to uninstall the program?

Does that explain the two icons and the two entries to uninstall the program?
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cor-el
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Yes, that is the most likely explanation for seeing two Firefox entries in the Windows Control Panel. We regularly see questions about seeing multiple Firefox version showing in the Windows Control Panel Programs section and this is always caused by the updater not having removed the entry for the previous version unless there is a 32-bit and 64-bit version installed in different folders.

Yes, that is the most likely explanation for seeing two Firefox entries in the Windows Control Panel. We regularly see questions about seeing multiple Firefox version showing in the Windows Control Panel Programs section and this is always caused by the updater not having removed the entry for the previous version unless there is a 32-bit and 64-bit version installed in different folders.
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Question owner

So to be triple sure I'm doing the right thing, just delete:

Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox 63.0.3 (x64 en-US)

(I get nervous when I do something in the registry!)

That should do it?

So to be triple sure I'm doing the right thing, just delete: Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox 63.0.3 (x64 en-US) (I get nervous when I do something in the registry!) That should do it?
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cor-el
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Did you check that this version points to the same installation folder as the other version?

You can export this key just to be sure before removing it.

Did you check that this version points to the same installation folder as the other version? You can export this key just to be sure before removing it.
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Question owner

Display|con:

For 63:

C:\Users|Frank|AppData\Local\Mozilla Firefox|firefox.exe.o

For 66:

C:\Users|Frank|AppData\Mozilla Firefox|firefox.exe.

 -----------------------------------------

For InstallLocation

For 63: C:\Users\Frank\AppData\Local\Mozilla Firefox

For 66: c:\Program Files (x86)\Mozilla Firefox

Display|con: For 63: C:\Users|Frank|AppData\Local\Mozilla Firefox|firefox.exe.o For 66: C:\Users|Frank|AppData\Mozilla Firefox|firefox.exe. ----------------------------------------- For InstallLocation For 63: C:\Users\Frank\AppData\Local\Mozilla Firefox For 66: c:\Program Files (x86)\Mozilla Firefox
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