Firefox Multiple Profiles : the easy way

1. Amend folder structure as so:

-FirefoxPortable
    -App
    -Data
        -default
            -plugins
            -profile
            -settings
        -dev
            -plugins
            -profile
            -settings
        -light
            -plugins
            -profile
            -settings
    -Other

2. Put bat file in PortableFirefox folder and run!

3. (optional) place "Parameters.txt" in each new folder with a single line of command line parameters to pass to Firefox (e.g. -no-remote for dev profile).

.bat

@echo off
cls

:: Set MYPATH to Bat file directory
set MYPATH=%~dp0

:: Set the file where you profile list will be stored
set TMPTXT=%TMP%\FFprofiles_tmp.txt
:: Make sure it doesn't exist
if exist "%TMPTXT%" del "%TMPTXT%"


:: Store list of folders in \Data to FFprofiles_tmp.txt
dir "%MYPATH%Data" /AD /B /ON /P > "%TMPTXT%"

:SELECT
echo Available profiles:
echo.

setlocal enabledelayedexpansion
set choices=0
set i=0
for /f "usebackq delims=" %%a in ("%TMPTXT%") do (
set /a i+=1
set choices=!choices!,!i!
echo 	!i! %%a
)
set choices=%choices%,

echo.

set /p profile=Select by number (0 to exit):
if %profile%==0 goto END
if "%choices%"=="!choices:,%profile%,=!" (
echo Incorrect selection
pause
cls
goto SELECT
)


:RUN
set i=0
for /f "usebackq delims=" %%a in ("%TMPTXT%") do (
set /a i+=1
if !i!==%profile% set profile=%%a
)
echo Opening "%profile%" profile...

:: Check if FirefoxPortable.ini exists in current folder and copies from Other\source if not
if not exist "%MYPATH%FirefoxPortable.ini" copy /-Y "%MYPATH%Other\Source\FirefoxPortable.ini" "%MYPATH%FirefoxPortable.ini"

:: Start afresh with temp file
del "%TMPTXT%"

set params=
if exist "%MYPATH%Data\%profile%\Parameters.txt" set /P params=>"%TMPTXT%"
)

copy /Y "%TMPTXT%" "%MYPATH%FirefoxPortable.ini"

START /B .\FirefoxPortable.exe

:END
del "%TMPTXT%"
exit /B

EDIT: If you change the folder names of your new profiles after first run against that profile firefoxportable won't find your extensions properly...
Deleting .\Data\*folder*\profile\compatibility.ini and .\Data\*folder*\profile\extensions.ini after changing folder name seems to sort this out.

Thank's !

There's also AndreasSeitz Portable profiles tool here: https://portableapps.com/node/5376#comment-112474

To whitch I propose some changes that make it work quite like the native FF profile manager :
https://portableapps.com/node/5376#comment-133358

but I faced a similar problem. I came across this topic, as well as an article on the site but the solutions offered there did not really fit me, so I did my own. I post it here in case anyone needs it.

1. Open FirefoxPortable\Data\settings\FirefoxPortableSettings.ini, change

LastProfileDirectory=NONE

then save it, and set ReadOnly attribute to this file.

2. Create FirefoxPortable\FirefoxPortable.global with the following content

[FirefoxPortable]
AllowMultipleInstances=true
DisableIntelligentStart=false


3. Create FirefoxPortable\load_profile.cmd with the following content

@echo off
@setlocal

:check_profile_lock
@setlocal
set "profile_lock_file=%~1\%lock_file%"
if not exist "%profile_lock_file%" exit /b 0
>nul 2>&1 del /f /q /a "%profile_lock_file%"
if exist "%profile_lock_file%" exit /b 1
exit /b 0


4. Now create FirefoxPortable\%_PROFILE_NAME_%.cmd files (or just directly run FirefoxPortable\load_profile.cmd %_PROFILE_NAME_%) containing

@call "%~dp0\load_profile.cmd" "%~n0"

Examples
_heavy.cmd (begins with "_") - will load FF with FirefoxPortable\Data\_heavy profile
__clean.cmd (begins with "__") - will load FF with FirefoxPortable\Data\__clean profile, profile will be DELETED before loading each time. If profile is currently used by FF, script will do nothing.
__test_heavy.cmd (begins with "__", "_base_profile" appended after name) - will load FF with FirefoxPortable\Data\__test_heavy profile, profile will be DELETED and cloned from _heavy profile before loading each time. If profile is currently used by FF, script will do nothing. If original "base" profile is currently used by FF, script will also do not run (but profile will be already cleaned).

Also you can use "load_profile.cmd _heavy", "load_profile.cmd __clean", "load_profile.cmd __test_heavy"

Profile name started with "_", because filename started with "_" are in the top of the list.

P.S. I hope this will be useful to someone.
P.P.S. sorry for the bad English. I'm Russian and I'm drunk (^_^) so the text is translated by Yandex.

The easiest way, and the way we support multiple profiles without needing multiple full installs of Firefox Portable, is with the Second Profile tool: https://portableapps.com/support/firefox_portable#second_profile

You can install multiple copies, rename them as you'd like in the PA.c Platform, and the platform will even keep the profile tool up to date in all copies as long as you follow the naming convention in the link.

Need to run Firefox with multiple instances with different profile at same time because my web based software is supporting only one user instance as a time (Operator or Supervisor), so, I am trying run both of them at same time, can any one help me?