Hello, I noticed that ModernFix does not play nicely with DashLoader after the mod gets cached.
Upon attempting to launch the game for the second time after installing the mod, the
loading bar gets stuck and doesn't move.

I would suggest you to clarify on the CurseForge and Modrinth pages of ModernFix
that there's an incompatibility with DashLoader, because I only found out about it
when I launched the game, and through the fabric.mod.json file.

I really do like ModernFix, should open an issue on DashLoader regarding the issue in order to solve it?

Additionally, I have another suggestion, consider adding "tooltips" with explanations for the different
modifications that the can be toggled on and off in the game?

How are you managing to launch the game? The intent of breaks is that it immediately triggers Fabric Loader to display an error dialog on launch.

I'm aware what the intent "breaks" does, although I was curious as for what would happen if I were to override it (by deleting it), since the incompatibility isn't actually mentioned on the download page of the mod.
To clarify, I have some experience "breaking" mods of developers (purely out of curiosity) and see what happens.

Here's a video that demonstrates how I managed to do it,
and it shows when the game gets stuck on launch.
I recommend watching the entire video.
https://user-images.githubusercontent.com/104154497/236609416-c34d2ff1-8777-4c5d-b1c5-b07b9fa7dc2a.mp4

This incompatibility is known and is why I don't support DashLoader. The mods change much of the same code and from my testing it's not worth the effort to make it work.