A portable application can be run from a removable drive (USB flash drive, iPod, portable hard drive, etc) on any Windows computer without installation.
You will carry the program with settings on removable drive and don't modify settings on host computer.
On Vista and above turn off User Account Control (UAC) or run launcher as admin.

02 September 2019

Web browser without installation.
Portable Nightly MultiVersion 32-64 bit Multilingual Online (0.5 MB) 30/08/17
Select language and enter Version Number: 71.0a1
Portable Developer MultiVersion 32-64 bit Multilingual Online (0.5 MB) 19/01/18
Select language and enter Version Number: 70.0b6
Portable Firefox MultiVersion 32-64 bit Multilingual Online (0.5 MB) 07/08/17
Select language and enter Version Number: 70.0b6 or 69.0 or 68.1.0esr or 60.9.0esr

Nightly, Developer and Firefox have their own profile in Data

64-bit variant of Firefox without installation.
Download Portable Waterfox MultiVersion Multilingual Online (0.5 MB) 04/02/18
Select language and enter Version Number: 56.2.14
Can use Java Runtime Environment Portable

Optimized Firefox Browser without installation.
Portable Pale Moon 28.x 32-64 bit Multilingual Online (0.5 MB) 16/08/18
Select language and enter Version Number: 28.7.1
For Windows XP download palemoon-24.7.2.win32.installer.exe and (if needed) palemoon-24.7.2.win64.installer.exe and run Pale_Moon_Portable_24.7.2_32-64_bit_Multilingual-Setup_Extractor.exe in same folder.
On first run, check allow Language Pack installation, click on Continue but close and restart by launcher.

PasswordFox for Firefox Portable.
Download PasswordFox 1.58 32-64 bit Multilingual Online (0.5 MB) 30/01/18
Extract and run PasswordFoxPortable.

NPAPI Flash Plugins

Multilingual Online will download setup in selected language (Afrikaans, Shqip, عربي, Հայերեն, অসমীয়া, Euskara, Беларуская, বাংলা (বাংলাদেশ), Bosanski, Brezhoneg, Български, Català, 中文 (简体), 正體中文 (繁體), Hrvatski, Čeština, Dansk, Nederlands, English (British), English (South African), English (US), Esperanto, Eesti keel, suomi, Français, Frysk, Pulaar-Fulfulde, Gàidhlig, Galego, Deutsch, Ελληνικά, ગુજરાતી, עברית, हिन्दी (भारत), magyar, íslenska, Bahasa Indonesia, Gaeilge, Italiano, 日本語, ಕನ್ನಡ, Қазақ, ខ្មែរ, 한국어, Latviešu, lietuvių kalba, Македонски, മലയാളം, मराठी, Norsk bokmål, Norsk nynorsk, ଓଡ଼ିଆ, فارسی, Polski, Português (do Brasil), Português (Europeu), ਪੰਜਾਬੀ, română, Русский, Српски, slovenčina, Slovenščina, Español (de Argentina), Español (de Chile), Español (de México), Español (de España), Svenska, தமிழ், తెలుగు, ไทย, Türkçe, Українська, Tiếng Việt, Cymraeg, isiZulu) and extract files.
Extract and run FirefoxPortable or PaleMoonPortable (both have their own profile).
Settings of installed Firefox should be preserved.

Multi-Users: change Profile by editing FirefoxPortable.ini or PaleMoonPortable.ini with User=NameOfNewUser
Associated to Thunderbird Portable if FirefoxPortable and ThunderbirdPortable folders are in the same folder. A click on a mailto link in FirefoxPortable open a new mail in ThunderbirdPortable (don't work on Windows 8 and above).

135 commentaires:

The_Steph said...


PaleMoon downloader does not install any portable launcher. I had to use one from an old version you made. Is this the expected behaviour?

Thanks for your hard work anyway.


Bernat said...

You are right, installer updated.

The_Steph said...


Thanks for your quick answer.

I was wondering if you were the Bernat posting on Avaxhome because each new post of your blog has a similar post on Avahome (I use RSS for both sites) but now I know...

Thanks again.

fadi mahir said...

merci bcp


Lee van Cleef said...

For Palemoon, you can also use the downloader to get Palemoon 12.3 revision 2 by entering "12.3r2" for version.

Bernat said...

Thanks Lee van Cleef.

konic said...

PaleMoon still does not have 64-bit 12.3r2

Bernat said...

You are right: installer updated.


Good day
Kindly request for Waterfox 64 Portable.
Many thanks for your effort.
Best Regards

Bernat said...

Sorry for Waterfox but I can't extract files from setup without installing.

qq said...

Latest waterfox got portable zip here: http://sourceforge.net/projects/waterfoxproj/files/portable/Waterfox%2015%20Portable.zip/download

It's just a zip of the executable, not truly portable, maybe Bernat can change that. Thanks a bunch for the great service.


Dear Friend,
Thank you very much for the Waterfox 15 Portable.zip, I appreciate it.
It would require the Microsoft Visual C++ Redistributable found in:
Beat Regards

swede said...

Hi Bernat,

Thanks for all your efforts. I've been using your apps for years.

I get the error "Profile is still in use" when trying to restart Firefox after closing. It doesn't matter if I have exit FF properly or the hard way.

I've solved by creating a batch file that deletes the parent.lock file. Looks like this:
@echo off
del data\profile\parent.lock

Something you can consider implement in your launcher?

Bernat said...

I think you don't use the latest launcher.

parent.lock is no more deleted by by Firefox when leaving so I removed the check few month ago.

Bill said...

Thank you many, but I was wondering why the appz posted here all
need admin rights. I thought that files and registry files where
stored in a folder so you won't need full access to the host system,
like ThinApp or Spoon Studio for example.

For browsers it ads a security risk, or am I wrong?

Bernat said...

Firefox Portable need admin rights just for Thunderbird Portable association.

Muhammad Ramzan said...

Firefox is the awesome browser...

sandhi sudha plus

Faiakes said...


Compstuff said...

Your stuff is AWESOME THANKS... When I use the latest PaleMoon downloaded and enter 15.1.1 it installs 15.1 and requires and update to 15.1.1

Bernat said...

Yes I know.
I think it's a bug of Palemoon itself and will be fixed in further update.

seitlich Blogger said...

sorry, but waterfox is really bad! this software contains some curious code which (re-)open itself- again and again and again and ...
i've seen such effects some months ago. that was an officially described malware. sorry, but this prog has the same behaviour like the named one...

(ok, waterfox has all the functions like firefox has. it is (sometimes) fast, it renders gfx & imgs fast, reads scripts %& styles standard compliant, .... BUT its behaviour is like a malware prog :-(

Serj Avede said...

Hi, Bernat. I suggest to make portable Firefox x64 based on XhmikosR`s build http://xhmikosr.1f0.de/firefox/ (it’s ordinary Firefox, just x64-compiled), because forks (Pale Moon or Waterfox) have some troubles always... I’m using XhmikosR`s Firefox with your Firefox launcher and translation from ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/16.0/win32/xpi/ (for Firefox 16.0) and
it works fine, but installer (like your Portable Pale Moon 15.x installer) would be better than manual replacement.

Bernat said...

Sorry, but there is yet Nightly, Pale Moon and Waterfox in 64 bit.

Anonymous said...

the firefox downloader link not working for 17.0b1 or 16.0.1 ...
plz fix the file..!

Bernat said...

Tested working.
Nothing to fix.

Asuzen said...

firefox downloader link not working for 17.0b1 or 16.0.1

This message: "download of Firefox Setup 17.0b1.exe (tr): 200 Switching to binary mode."

or This message: "download of Firefox Setup 16.0.1.exe (tr): 200 Switching to binary mode."

Bernat said...


Asuzen said...

Why me and Nilesh Sanghavi not working.

Bernat said...

Working also for me with Turkish:

Asuzen said...

Thank you very much too

DADA RulZ said...

Can i somehow add the winamp toolbar?

Bernat said...

I don't use: I don't know.

seiferflo said...

Quote: "if FirefoxPortable and ThunderbirdPortable folders are in the same folder. A click on a mailto link in FirefoxPortable open a new mail in ThunderbirdPortable"

- Does the opposite behavior works? For eg, if I click on a link in a mail in TB, does it open in FF portable? That would be really good.

- FF Portable 17.0B1 & B2 frozes with the last Flash 11.5.500.97beta. Is it also frozing with a non portable version? If no, what happens exactly?

- On Win8 & Win7 I pinned the FF & Portable icon on the taskbar. When I open it, it creates a new icon because I suppose the launcher is calling the the normal executable, so 2 different process.
Is it possible to get one simple icon for both? I know this happens for all the portable apps you have so as ppapps.com, but is there a trick I can use?

Thanks in advance for your help Bernat.

Bernat said...

- Yes, just try, working for me.

- Flash no more froze Firefox with latest launcher. Read sources lines 52-57 & 83-86

- firefox.exe is the child process of Firefox<portable.exe. I don't use icons in taskbar.

seiferflo said...

Thx for your reply.

- Not working for me. Tried to move to different folders. Is there any option in Thunderbird, in the about:config maybe, to define FFP as main browser?

- Good work, it's indeed not frozing anymore with your last launcher.

- Well I pined the Firefox Portable icon on the taskbar and when I click on it, it creates a new icon of firefox just next to it...

Bernat said...

You must have admin rights.

Don't change name of folders:

In ThunderbirdPortable.ini:

LeGeNdFB_GNC said...

Profil is yet in use by another Firefox!
when ı start firefox after 12x version ı getting this error, creating this file at every startup in FirefoxPortable\Data\Profile parent.lock error

ı know this tips:
@echo off
del data\profile\parent.lock
but I dont want it that way...What is the solution???
thanks genco

Bernat said...

The check of parent.lock has been removed from Firefox launchers several months ago.
Download latest installers.

LeGeNdFB_GNC said...

ı'm use latest version 16.0.1 but same error again....ı am back to version 12 cause no error...

Bernat said...

"Download latest installers" don't mean download latest version of Firefox but download again Firefox_Portable_MultiVersion_Multilingual_Online.exe

LeGeNdFB_GNC said...

Thank u Bernat its done : )

seiferflo said...


I have admin rights.
The folders are fine.
I still have 4 icons instead of 2 when FF & TB are running.
The ini configuration is also fine (I added FirefoxAssociate & ThunderbirdAssociate).
I still can't open links from Thunderbird and the mailto links from FireFox are opened by the windows mail metro from Win8.

Is it because I'm using Earlybird instead of Thunderbird? Also FF & TB have to different profile name in the ini file.

Sorry. Thank you for your help

seiferflo said...

Also (please add this comment to the previous one).
Firefox Portable is behaving weirdly regarding going up & down in page using the keyboard. For Eg if I press the arrow down to scroll down in the page, FF goes to the end. Home button doesn't do anything. End just moves me down of a few lines then go back to the top.
I don't have this issue with FF Portable from Lbk or Papps. Any idea please?

Bernat said...

"Is it because I'm using Earlybird instead of Thunderbird?"
Of course: Earlybird and Daily have no association to Firefox and this explain also why Firefox don't associate to Earlybird.

No problem for me to scroll with keyboard in Firefox (16.0.1).

seiferflo said...

AH sh.. I've been trying hundreds of tricks before I realize that.
No way on your side to make Earlybird associate with Firefox the same way TB does? Else I guess I'll have to downgrade.

Solved the keyboard problem, the "caret browsing mode" was activated.

Regarding the icons, do you have this issue? Please check the following screenshot: [IMG]http://i.imgur.com/IcBM4.gif[/IMG]
Thanks again for your help

Bernat said...

In App rename Earlybird folder in Thunderbird
(same in App\DefaultData with *Profile)

Use ThunderbirdPortable.exe as launcher and ThunderbirdPortable.ini to set User

No solution for icons.

The_Steph said...


Just for info, PaleMoon donwloader does not get 15.2.1 version for x64 it only gets 15.2

Bernat said...

Yes, I know.
Seems to be a display bug of program itself.
Download link used by installer is:

The_Steph said...


When I was looking to the files date, they were from the 5th of october while when I downloaded the zip packed version files were from the 28th as the 32bits version.

Maybe I did something wrong.

Bernat said...

You are right.
Installer fixed (was modified for 12.3r2 x32 but 12.3 x64).

Eduardo Adrian Perez said...


Trying to download 17.0b4, but some error with that, do not download.

Thanks for your work.


Bernat said...

Download OK with English and French.
I can't test all languages.

Trommy said...

Thnx for Waterfox Portable 15.0...good job!
But already release 16.0.1 ver. of Waterfox. When wait from portableappz?

Bernat said...

Waterfox updated to 13.0.1

jason2005 said...

Hello bernat, how use passwordfox please? I extract but after? where is the program?

thank's an regards

Bernat said...

"run PasswordFoxPortable"

Azure said...

Hi Bernat,
I try to make Nightly Portable installer (Offline and Online).

If user choose Offline Installer in first screen, the installer will extract firefox-$VER.en-US.win32.installer.exe and firefox-$VER.en-US.win64-x86_64.installer.exe from $EXEDIR.

And if user choose Online Installer, the installer will download Nightly Setup from the internet.
I think it's a good idea if user want to extract Nightly Portable but have been downloaded Nightly Setup, and don't want to redownload Nightly Setup again :D

You can download it here:

Bernat said...

Good idea but notice that Nightly is daily updated.

Richard Cranium said...

Can someone please upload Waterfox 18.01 to a better site....after nearly 3days I still cannot download it.

Azure said...


(md5: 803ef6f29a56445542439dded53a4e84)

Azure said...

Just share again :D

Nitro PDF Plugin for Firefox Portable:

1. Download Nitro PDF Plugin Portable and extract it (CommonFiles and *Portable folder at the same location)
2. Add this source into FirefoxPortable.nsi

; Begin of Source
!define REGKEY1 "HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{31A8CFAE-8579-4EBA-A9D7-19426509F882}" # Added in Define Constants under --- Define RegKeys ---

!include "LogicLib.nsh" # Added after !include "..\_Include\Launcher.nsh"

Function NitroPDFPlugin # Called in Section "Main" after Init
${GetParent} "$EXEDIR" $0
StrCpy $NITROPDFPLUGINDIR "$0\CommonFiles\NitroPDF"
${If} ${FileExists} "$NITROPDFPLUGINDIR\BCGCBPRO1710u100.dll"
${AndIf} ${FileExists} "$NITROPDFPLUGINDIR\js32.dll"
${AndIf} ${FileExists} "$NITROPDFPLUGINDIR\mfc100u.dll"
${AndIf} ${FileExists} "$NITROPDFPLUGINDIR\NitroPDFActiveX.ocx"
${AndIf} ${FileExists} "$NITROPDFPLUGINDIR\npdf.dll"
${AndIf} ${FileExists} "$NITROPDFPLUGINDIR\npnitromozilla.dll"
${registry::BackupKey} "${REGKEY1}"
WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Classes\CLSID\{31A8CFAE-8579-4EBA-A9D7-19426509F882}" "InstallPath" "$NITROPDFPLUGINDIR\"
WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Classes\CLSID\{31A8CFAE-8579-4EBA-A9D7-19426509F882}\InprocServer32" "" "$NITROPDFPLUGINDIR\NitroPDFActiveX.ocx"
System::Call 'Kernel32::SetEnvironmentVariableA(t, t) i("MOZ_PLUGIN_PATH", "$EXEDIR\Data\Plugins;$PARENTDIR\CommonFiles\Plugins;$PARENTDIR\CommonFiles\Java\bin\plugin2;$NITROPDFPLUGINDIR").r0'

Function NitroPDFPluginClose # Called in Function Restore before Close
${If} ${FileExists} "$NITROPDFPLUGINDIR\BCGCBPRO1710u100.dll"
${AndIf} ${FileExists} "$NITROPDFPLUGINDIR\js32.dll"
${AndIf} ${FileExists} "$NITROPDFPLUGINDIR\mfc100u.dll"
${AndIf} ${FileExists} "$NITROPDFPLUGINDIR\NitroPDFActiveX.ocx"
${AndIf} ${FileExists} "$NITROPDFPLUGINDIR\npdf.dll"
${AndIf} ${FileExists} "$NITROPDFPLUGINDIR\npnitromozilla.dll"
${registry::RestoreBackupKey} "${REGKEY1}"

; End of Source

3. Compile

Tadaaa... now you have pdf viewer in Firefox Portable without install any program.

n/b: for Nightly Portable user, you must edit about:config (enter about:config in addressbar, click I'll be careful, I promise!), search plugin.disable_full_page_plugin_for_types double click on it, and delete application/pdf, relaunch NightlyPortable
I don't know about Aurora Portable :P

Azure said...


Nitro PDF Plugin Portable

CommonFiles and FirefoxPortable folder at the same location.

Dũng Nguyễn said...

Can you add vietnamese language to this Firefox Portalble?

Thanks you!

Bernat said...

Vietnamese added to Firefox Portable Multiversion Online Installer.

Richard Cranium said...

Waterfox is almost dead. You should drop it or switch to Cyberfox.

Bernat said...

Cyberfox Portable

Richard Cranium said...

Thanks I like Cyberfox better then Waterfox. I have a request. I see there is a Palemoon x86 and x64, how about a Firefox/Cyberfox combination? I have seen some problems with Palemoon that is why I do not use it.

Bernat said...

If you want Cyberfox and Firefox using same profile, copy Cyberfox folder from CyberfoxPortable\App to FirefoxPortable\App and CyberfoxPortable.exe in FirefoxPortable.

seiferflo said...

Thx again for the new version.
Do you know how to trick windows, most especially Outlook 2013 to open links in FF portable?

So far, I'm using a program called "Registry FF portable with default", which helps to make FF portable a default program in windows.
There are 2 behaviours:

1: I register Firefox Portable as default. Result: If I click any link including Outlook, it opens FF portable (provided it was not launched before, else I get the message "another Firefox is running").

2: Because I always have FF launched, I use method 2 which consist of fixing the method 1 message by registering the non portable exe as default.
If FF portable is not launched, any link opens the normal Firefox without my data. If FF portable is launched, it opens a new tab which is great, however, it is not working in Outlook 2013 (nothing happens).

I would like to fix the last one as I receive tons of links through Outlook and I often need to open my online account to open a link in FF portable.

Is there a way that you could trick your launcher to help me with that please?

Sorry for the long explanation and thanks in advance for your answer.

Bernat said...

1: To avoid "another Firefox is running" try AllowMultipleInstances=true in FirefoxPortable.ini.

2: Never launch directly main exe: you will lost settings or use command-line:
firefox.exe -profile "path_of_portable_profile"

On Windows 8 my ThunderbirdPortable no more open links in FirefoxPortable.
I right-click copy link and paste in FirefoxPortable address bar.

fung victor said...

hi,I got this error (see below link) & could not continue the installation, pls help fixing the problem, THANKS!


Bernat said...

You must enter 23.0 and not 23

Vangelis said...

Hello Bernat! :-)

I am on WinVista Home Premium SP2 x86 and I downloaded the new version of your Fx Nightly portable installer @

After I typed the version number 27.0a1, there followed no prompt about the OS architecture (x86 or x64) and the online installer downloaded by default the 64bit binaries...
It took me a while to figure out what was happening and why the portable launcher did not start the browser (in my 32bit OS) :-{
I eventually fixed this by downloading manually the win32 binaries from the Mozilla FTP and placing them inside App/Nightly folder, but can you please fix the portable installer itself?

Thanks for all your hard work, I do realise that bugs are bound to happen...
Regards from Greece.

Bernat said...

Thanks for reporting.
Old 32-64 installer back.
When I tried new 27.0a1 only win64-x86_64 was available and not yet win32 so I thought there was only one version for 32 and 64 bit systems.

Unknown said...

I've used the actual Multiversion Online downloader to download/make portable the version 12.0 (latest working on windows 2000).
Downloaded OK, seem to work OK...
I wish to know if something can be wrong and if YES, how can I check. Should I search for the original packed 12.0 portable?

Bernat said...

No problem.
You can list all versions available here

Unknown said...

About The actual Multiversion Online downloader:
it must download the setup or it can use the setup archive in the same folder as he is if already downloaded (download if not present in same folder)

Bernat said...

Installer don't search setup in its folder and must download.

Da Creta said...

Hello Bernat,
it is impossible to download and install in italian. A window appears: "Download of Aurora Setup 27.0a2.exe (it): SendRequest Error".

Bernat said...

Retry now.
For me link is good again.

laylaylom yellow said...

download of firefox setup 26.0.exe (tr): 200 switching to binary mode.
installer not working?

Bernat said...

Installer working.

Neo88 said...

Can you post links to previous Firefox versions?
I need Firefox 24.

Bernat said...

Enter 24.0 in online installer.
All version numbers.

Colin Knight said...


The Portable Pale Moon installer isn't working for me. It says it can't find the .exe file.

I think it maybe that the storage.sity.nl
download link isn't is use anymore.

Can you confirm if an update is needed or is it me?


Bernat said...

You are right.
Domain is no more storage.sity.nl but now relmirror.palemoon.org.
Installer updated.

PocketAppZ said...

Your post says PasswordFox is version 1.50 but the latest version is 1.55

Phuc said...

How Firefox launcher without run as administrator rights?

Bernat said...

Should run without administrator rights.
Launcher use registry only to associate to Thunderbird Portable.

Marc Hops said...

Hi Bernat,

Could you add a setup extractor feature to Pale Moon?

URLs change as time goes and some users may need older versions to play with (test web pages, see the improvements etc. For example, Pale Moon 27.7.2 was the last supported version for Windows XP but that installer is now unavailable through the online installer.

Please also consider a setup extractor for Java 7 (as for Java 6 - it is now at build 80).


Bernat said...

Latest is 25.7.0.
Older can't be 27.7.2.

Java SE 7 End of Public Updates.

Marc Hops said...

Sorry, I meant Pale Moon 24.7.2.

Jave 7u80: http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html

Bernat said...

Pale Moon Portable 24.7.2 32-64 bit Multilingual and Java 7 32-64 bit Setup Extractor added.

ex1337 said...

Download of firefox-42.0.ru.win32.installer.exe: File not found (404)

Bernat said...

Retry. Links tested:
http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/42.0/win32/ru/Firefox Setup 42.0.exe
http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/42.0/win64/ru/Firefox Setup 42.0.exe

Rocksoccer said...

Can we add support for pcxFirefox? Mozilla is going to start limiting users' options by enforcing add-on signature.

This pcxFirefox fork will be a very good candidate for any people who still prefer to keep their freedom of using any add-on they like.


Bernat said...

This can be done.
Extract the content of firefox folder found in downloaded 7z archive in App\Firefox or App\Firefox64
Tested working.
Backup existing folder by renaming if you want to go back.

Marc Hops said...

PaleMoon 24.7.2 links are dead.

PlaeMoon admins moved all archives to archive.org: https://archive.org/download/Pale_Moon_Archive_2015_08/Pale_Moon_Archive_2015_08.zip/

Bernat said...

Thanks, links updated.

CyberAge e-Solutions Pvt. Ltd. said...

I downloaded Firefox portable 50.0. Unfortunately it's default language is Russian. I can now again download in English or you can help me by letting me know how to switch to English language. I tried about:config and set general.useragent.locale as en-US. I have also downloaded en-US.xpi. Still it is in Russian. Please help me to change language (how to set as I can't read Russian so not understanding Menu)

Bernat said...

You can't switch to English from Russian version.
Online installer download a different setup for each language and you have to run it again checking English on startup.
You can also try to copy en-US.xpi in FirefoxPortable\Data\Firefox\extensions.

CyberAge e-Solutions Pvt. Ltd. said...

tried that too. nothing changed! Still it's Russian!

Bernat said...

Tested in English running online installer with "English (US)" on startup.

Mooot Gtreet said...

Hi Bernat,

About Flash: on Win10 x64 32-bit Pale Moon browsers (maybe other Firefox versions as well) freeze on opening Flash content (64-bit Pale Moons are not affected)

I experimented some and found that FlashPlayerPlugin.exe needs to be in the folder where NPSWF32.dll is - and there are no more freezes. Please include FlashPlayerPlugin.exe in Portable Flash.


Bernat said...

FlashPlayerPlugin.exe added in Flash NPAPI Plugin 32 bit.
Thanks for tests and solution.

FredThompson said...

The "old" methods to set FirefoxPortable to be the default browser are no longer working for me.

Looking at the registry, it seems some entries might need the -profile (path) argument and some do not.

If I set all "openwith" settings to - profile (path), FirefoxPortablej knows it is set as the default but clicking on .url or .htm will complain.

Does anyone know how to set the "openwith" registry settings so FF 42 will be the default in all circumstances? If so, please share that information.

Daniel Ulman said...

Hi Bernat,

Even putting "AllowMultipleInstances=true" in the "FirefoxPortable.ini", I can not open a second instance of FirefoxPortable.

It can be fixed?

Thank you very much!!

Bernat said...

Tested working.

Daniel Ulman said...

Hi again Bernat,

It does not work for me.

What am I doing wrong?

Do I have something misconfigured?

Once again, thank you so much!!

Bernat said...

Sorry, I can't fix a problem I can't reproduce.
When I launch again FirefoxPortable (with AllowMultipleInstances=true in FirefoxPortable.ini) it start another windows of Firefox with the same profile.
Be sure you don't edited the hidden FirefoxPortable.ini in Data and you changed false to true after AllowMultipleInstances= (not adding another AllowMultipleInstances= otherwise only the first is readed).

Daniel Ulman said...


I think I found the cause.

I only installed the 64-bit version of Portable Firefox because my Windows is a 64-bit version.

If I install both versions (32 and 64 bits), it works as expected.

Thanks again, for your work and for the answers!!!

Bernat said...

Thanks for founding the cause.
FirefoxPortable.exe fixed.
You can test it no more need 32 bit installed by deleting (or renaming in Firefox32 for backup) the Firefox folder in App.

Daniel Ulman said...

Sorry for the delay in replying.
It works great.
Thanks once again!!

Epitaph said...

Version 57.0 deleted my profile from C:\Users\AppData\Roaming\Mozilla\Firefox\Profiles

Never happened before.

Bernat said...

Installed profile tested preserved.
Don't run installed when portable is running.

Epitaph said...

Just surfing on PortableAppZ and of course Firefox was running when I opened the 57.0 portable. Maybe I'm wrong but I expected to get this messsage: "Another Mozilla Firefox is running. Close Mozilla Firefox before running Mozilla Firefox Portable". Thanks anyway!

Bernat said...

You are right "Another Mozilla Firefox is running. Close Mozilla Firefox before running Mozilla Firefox Portable" should have been displayed but I did a (bad) modification of launcher to allow several instances (request of Daniel Ulman few comments above).

Sorry for your profile: check if there is a folder Mozilla-BackupByFirefoxPortable in c:\Users\?\AppData\Roaming\ (portable not running).

Hellwat said...

Is it possible to rename the firefox.exe so that it still starts from FirefoxPortable.exe?
Or is there an entry in the FirefoxPortable.ini which detects the renamed firefox.exe?
The name firefox.exe should not appear in the task manager.

Thanks a lot

Bernat said...

"The name firefox.exe should not appear in the task manager"
Why? FirefoxPortable.exe launch firefox.exe and both are running until firefox.exe is closed.

Bernat said...

"It would be ideal if there was a line in the Portable.ini, e.g. App = fifox.exe or similar"
No such line available but you can edit \Other\Source\_FirefoxPortable.nsi in lines 8 and 10 and compile a new FirefoxPortable.exe with NSIS.
Otherwise you can launch with command-line:
fifox.exe -profile "X:\PortableApps\FirefoxPortable\Data\Firefox"
But portable Flash and Java will not work.

Hellwat said...

worked very well with the command line,
is it still a portable version now?, since the FirefoxPortable.exe is not called.
My link:
"D:\Programme\Internet\Portable Firefox 50\App\Firefox\Fifox.exe" -profile "D:\Programme\Internet\Portable Firefox 50\Data\Firefox"

The _FirefoxPortable.nsi I've looked at, but as soon as I press compile an error message appears:
could not find: "Registry.nsh" that is unfortunately not there.

Bernat said...

FifoxPortable.exe expecting fifox.exe in App\Firefox or App\Firefox64

Lucas McCain said...

I just installed the 52.7.3ESR 64 bit version. If I start it with PortableFirefox.exe then both facebook and google are blocked with 'Your connection is not secure' and 'This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.' However, the link I am using is HTTPS. If I run Firefox.exe from the App folder then everything works fine. Any fix?

Bernat said...

No problem for me opening https://www.google.com in Firefox 52.7.3ESR 64 bit.

Victor Fung said...

Using the provided "portable firefox multiversion 32-64 bit multilingual online" to download the firefox 62.0, howerver, it can't process due to the following error, can you fix that? thanks in advance...
PC : W10 1803 with admin. rights; no problem on portable Google Chrome 69.0

Bernat said...

Nothing to fix.
You entered 62 in place of 62.0

yannick corgnet said...

est il possible de déplacer le cache ou le profil sur un autre répertoire ?

Bernat said...

Non, désolé.

yannick corgnet said...

et le répertoire c:\AppsPortable\Firefox\Data\ complet ?
j'utilise un ssd et je voudrais déplacer les datas sur un disque dur classique

Bernat said...

Ce n'est pas prévu :ce n'est pas le but d'une application portable.

Daniel Ulman said...

Hi Bernat,

After I update to version 67.0, when I click on a link from another application (for example a Thunderbird email) Firefox open a new windows and it uses a new profile (instead of my profile)
In previous versions it opened inside the already running Firefox Portable without any trouble.
Is there any workaround?

Thank you in advance!!

Bernat said...

This was not working on Windows 8 and above and now no more.
No solution, sorry.

Daniel Ulman said...

I think I found a workaround.
If I create a profile that has Firefox as the name (the default profile of the portable) and the path to the corresponding folder,
the behavior of the links of Thunderbird or the double click in an html file, is the expected one.
What I could not get for now is to create the profile by passing parameters during the start of Firefox.

Unknown said...

hi bernat
in pale moon 28.7.0 x64 i cant open another pale moon even while "AllowMultipleInstances" is true.i want when open a .html file while pale moon is exist, that .html file open in new tab in existing pale moon. is it possible?
i already register pale moon launcher as default Browser by using "RegisterFirefoxPortable.exe" app from "Ramesh Srinivasan".

Bernat said...

Replace PaleMoonPortable.exe (use AllowMultipleInstances=true in PaleMoonPortable.ini)

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