My left panel is not showing when I'm on the site

[FlyingHermes]

When I go to the site, its borders overlap my left panel

[Tintouin]

This left panel needs to be configurated with the extra left sidebar, you can find more in https://github.com/Godiesc/firefox-gx/tree/main/Extras/Left-SideBar

[FlyingHermes]

I was very inattentive, my problem is solved.

You just had to turn on the "always show" feature."

[Godiesc]

I saw your selected tab with a bug in the image, rare, I tested it again an for me looks right.