I had LibreWolf installed as a flatpak on Linux Debian.

ID: io.gitlab.librewolf-community
Branch: stable
Version: 131.0.3-1
Collection: org.flathub.Stable
Installation: system
Installed: 361.4 MB

I am wondering whether is better to switch away from flatpak in favor of their apt repository called "extrepo": https://librewolf.net/installation/debian/

$ apt-cache show librewolf | grep Installed-Size
Installed-Size: 204 MB

I have always been thinking that the Flatpak causes more disk and network usage.

So I have tried to switch from a Flatpak to a package and it worked:

Went to about:profiles page, clicked to open current profile path. Quit LibreWolf. Install LibreWolf from a package using instructions under above link:

Code:
sudo apt update && sudo apt install extrepo -y
sudo extrepo enable librewolf
sudo apt update && sudo apt install librewolf -y
Ran the LibreWolf from the package just installed, its path was /usr/share/librewolf/librewolf

Went also to the about:profiles page and opened the profile path, went one level up to its parent directory, renamed the profile folder to something else, copied over profile folder of the flatpak Librewolf (one that flatpak Librewolf opened from about:profiles). Renamed the copied folder, so package based Librewolf uses it. Other option is to edit profiles file and set correct name. Upon Librewolf quit/start, it loaded my profile/tabs.