Is a crack in my home's floor slab a concern?
Slab cracks like this are common and usually not a problem. If there is rebar or steel mesh in the slab it will usually just crack over time but the rebar or mesh provides the strength to stay in place. If the slab starts settling or shifting then there is a problem and the cause needs to be identified like a leaking pipe or drain taking the soil away that would need to be fixed first then the slab repaired. If it was an original failure to prepare the site grout can be pumped through the slab to correct any settling but your crack looks normal and like it has not shifted so I would not worry about it.