Steps to reproduce

1. Create a custom level.
2. Open a domain like jshelter.org and apply the level (or alternatively configure the same on "JS Shield details" page).
3. (Re)load the page.
4. Click on the popup, modify JS Shield,
5. The detail tweaks button is missing.

Additional info

1. Open the popup
2. Modify JSS
3. When applying a built-in level, the detail tweaks button is visible, it is removed when selecting a custom level.

Version

Confirmed in 0.11.2

I identified the problem https://lists.nongnu.org/archive/html/js-shield/2023-03/msg00005.html. Experimental level is also affected.

Level 0 should not be allowed to be tweaked. I locally edited the code to show tweaking button on all levels. That allowed me to apply L0 but activate some wrappers in the pop up. However, the tweaks are not stored to the config. After refresh the popup shows JSS slider as off. We would need to change a lot of logic around L0 to let users to tweak that level.

With other levels I did not found any problem as I originally expected.

So I will go with else (current_level.level_id !== "0") and release in 0.11.4