New
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Here's How To Run Firefox 56 alongside Firefox 57
With so many long time Firefox users not happy having to see so many of their legacy addons no longer compatible with the new Firefox 57 Quantum upgrade, here's a simple solution so you can have the best of both the old and the new Firefox.
• First be sure to make a backup copy of your existing FF 56 installation folder located in Windows 10 at:
C: \Users\ [username]\AppData\Roaming\Mozilla
• Next create a new top level local folder on your C:\ drive and call it Firefox 57 Portable (or any name so you remember this is the PORTABLE location.) DON'T put this new folder in or near the existing Firefox folder.
• Next download Firefox 57 Quantum Portable from PortableApps.com and save it to your new Firefox Portable folder >>
HERE IS THE DOWNLOAD LINK FOR FF 57 PORTABLE: Mozilla Firefox, Portable Edition | PortableApps.com - Portable software for USB, portable and cloud drives
• CLOSE YOUR FIREFOX 56 BROWSER NOW
• Next click and run the FF 57 PORTABLE .exe file and it will install in your newly created portable version folder in a sub-folder labeled \FirefoxPortable
• Open your Windows File Explorer and click into the new sub-folder to this file location:
\FirefoxPortable\Other\Source\ and with your mouse RIGHT CLICK ON the file FirefoxPortable.ini and select COPY from the menu.
• Next go back up to the directory \FirefoxPortable\ and RIGHT CLICK and select PASTE from the menu.
• Next click on that file you just pasted FirefoxPortable.ini and it will open in Windows Notepad and you should see this:
[FirefoxPortable]
FirefoxDirectory=App\firefox
ProfileDirectory=Data\profile
SettingsDirectory=Data\settings
PluginsDirectory=Data\plugins
FirefoxExecutable=firefox.exe
AdditionalParameters=
LocalHomepage=
DisableSplashScreen=false
AllowMultipleInstances=false
DisableIntelligentStart=false
SkipCompregFix=false
RunLocally=false
# The above options are explained in the included readme.txt
# This INI file is an example only and is not used unless it is placed as described in the included readme.txt
• Go to line 10 that says AllowMultipleInstances=false and type and replace the word "false" and change it to "true"
• Next click File in the top menu bar of Notepad and click SAVE
• Now you should be seeing in your File Explorer view this:
(folder icon) App
(folder icon) Data
(folder icon) Other
FIrefoxPortable.exe
FirefoxPortable.ini
help.html
• Now place your mouse over the file FirefoxPortable.exe and from the Right Click Menu select "Create shortcut" and a shorcut file will appear. You should rename the shortcut to Firefox Portable so you know that is the Firefox 57 Portable.
• Now Cut and Paste that shortcut and move it to your Windows Desktop.
• Finally open and close your old Firefox 56 to check to be sure everything looks the same there.
• Now open the new Firefox 57 Quantum and check that out.
• You can now safely run either FF 56 with all your addons or FF 57 Portable AND ALSO YOU CAN RUN BOTH AT THE SAME TIME!
ENJOY!!
FOR BOOKMARKS TRANSFER
• You can make a backup of your FF 56 Bookmarks and then in FF 57 do a Bookmarks Restore and use that 56 backup for the restore.
In your FF 56 Menu Bar select Bookmarks then select SHOW ALL BOOKMARKS and then from Import and Backup select Backup and name and save the backup so you can find it again. In your FF 57 Portable do the same thing and select RESTORE and use that saved FF 56 backup .json file and that will transfer all your bookmarks to FF 57 Portable.