Hi i cannot find some extension in the site @KitwareMedical/slicer-extensions-webapp
I use stable version but I cannot find Totalsegmentator and PyTorch
Per your link https://extensions.slicer.org/catalog/All/30893/win you are specifically browsing extensions for the 30893 revision which corresponds to Slicer 5.0.3. TotalSegmentator originally came out with Slicer 5.2 so it wasn’t available yet for that old Slicer version which is why it was missing.
I would suggest that if you want to browse the extensions from the web, that you click on the “browse extensions” link on https://download.slicer.org/ corresponding to the Slicer version and platform that you are using.