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%APPDATA%\Mozilla\Firefox\Profiles\

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  • Last reply by cor-el

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Windows 10 Fire Fox 55.0.3 I notices in this folder there are more profiles listed beside my wife an mine . I have 2 that are listed with our names, than I have 3 listed as default's . Are the default's safe to delete from folder?

Windows 10 Fire Fox 55.0.3 I notices in this folder there are more profiles listed beside my wife an mine . I have 2 that are listed with our names, than I have 3 listed as default's . Are the default's safe to delete from folder?

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These could be something you used but forgot about. Is it just you and the wife on the system?

Check the dates on the folders. That is when they were last accessed.


Separate Issue; Your System Details shows;

Installed Plug-ins

Shockwave Flash 9.0 r47 Shockwave Flash 26.0 r0
Having more than one version of a program may cause issues. You must remove the older programs. Then get the current full installer.

Flash: Grab the uninstaller from here:

http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html Uninstall Flash Player | Windows

http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html Uninstall Flash Player | Mac

Then reinstall the latest version.

Note: Windows users should download the active_x for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the active_x.

Flash Player Version 27.0.0.130

https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only>


See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

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A little more detail on checking dates: please check inside each of the profile folders to see the rough age of the files. For examples:

  • places.sqlite is the history database, so that would be updated whenever you have used that profile for non-private browsing, or whenever you last added a bookmark
  • in the bookmarkbackups folder, you'll find files with the creation date encoded into the file name

If they are too old to be useful, then you can remove the folders.

If you accidentally delete a live profile, try restoring it from the Windows Recycle Bin as soon as possible.

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You can check the compatibility.ini in each profile to see what Firefox version last used this profile.

Note that Firefox uses two locations for the Firefox profile folder, so you may want to remove files in both locations. Easiest to remove profiles would be to use the Profile Manager, but make sure to double check that you aren't removing your current profile. Profiles that have a date stamp appended were created as the result of using the refresh feature in Firefox.

Location used for the main profile in "AppData\Roaming" that keeps your personal data.

  • C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>\

Location used for the disk cache and other temporary files in "AppData\Local".

  • C:\Users\<user>\AppData\Local\Mozilla\Firefox\Profiles\<profile>\