Firefox Portable

I am using FirefoxPortable v88. This works perfectly under Windows 7 but when the same flash drive is started using Windows 10 64-bit I receive the following message:

"You've launched an older version of Firefox
Using an older version of Firefox can corrupt bookmarks and browsing history already saved to an existing Firefox profile. To protect your information, create a new profile for this installation of Firefox.
[Exit] [Create New Profile]

For example https://sede.mjusticia.gob.es/es/
That's the Spanish Government's Ministry of Justice website. While trying to load the browser finds a certificate but it spits SEC_ERROR_UNKNOWN_ISSUER and the web won't go HTTPS.

I guess this won't be the only official website that has this problem.

Firefox is running without admin privileges only on my win7 machine but why not on win10

Hi there

I have a very annoying problem with Firefox Portable. I have the latest available version as of today, Windows 10 Home 64 bit, 8GB RAM notebook, all Windows updates installed.

Hello, I used to have FF portable on my usb drive (bitlocker enabled) running on the Win10pro company laptop (Lenovo T14).
Today I notice that some settings are working no more, disappeared or greyed out and displaying "managed by your organization". For example, I lost the Mozilla account login for the sync.
The policy values are the following.
I supposed that being a portable app, the resident OS would not touch it, is there a way to avoid such interference by the company?

Firefox Portable can be updated from within Firefox. However, that can easily cross major versions as well.

Is it enough to replace the loader EXE with the one from the latest portable package? Or do I really need to install the new portable version into the folder of the older application?

error says already running.
installed firefox portable in separate folders so i can hopefully log into websites like microsoft and google with different accounts in different browsers at the same time accessing all google apps under that one email address. I use sperate browsers for credentials and project management with saved tabs where i left off.
I have changed ini allow multiple instances to 'true'
I have renamed firefox portable.exe (successfully) and sub folders(32/64) firefox.exe (unsuccessfully) programs to unique names

FireFox portable still writes data in the appdata folder
Also runs crash reporter by default.

Hi,
I use a program called SUMo from kcsoftwares.com to keep my programs up to date. I notice with Firefox Portable, SUMo checks what is the current version of FirefoxPortable.exe that is in the FireFoxPortable folder. However, if you use the Help>About menu from within Firefox Portable to update, FireFox Portable does update itself ok but does not update FirefoxPortable.exe, meaning that SUMo still thinks that Firefox needs updated.

i have many different firefoxportable in different folders. but recently this keeps happening whereby launching a 2nd firefoxportable will launch the 1st instance and thus a blank new window of the 1st instance instead of the 2nd instance.

Closing the 1st instance will resolve this but this shouldn't be happening. why is the 1st instance interfering with the launch of the 2nd instance?

these are the settings in all of my firefoxportable dirs: