Slice the pineapple, habanero, ginger, and onion. Remove the seeds and pith from the habaneros if desired for a milder spice.
Simmer the onion, pineapple, habaneros, and ginger in a pan with 1 cup of water until the ingredients are somewhat submerged in the water, 2-3 minutes.
Add in the salt and sugar. Simmer gently until the onions and peppers have softened, about 5-10 minutes.
Add the simmered mixture into a blender along with the vinegar, lime juice, marjoram, and cumin.
Blend until smooth and let cool.
Season to taste by adding more salt and/or sugar.
Add into hot sauce bottles or mason jar.
Notes
Useful accessories include hot sauce bottles and a funnel for filling bottles.