Rub chicken with salt and rinse well with water. Cut it into bite-size portions.
Set heat to medium-high and place chicken in a wide pot. Add in the vinegar, garlic, peppercorns, bay leaves, and onion. Allow it to boil for about 10 minutes. Do not cover the pot and do not stir the meat.
After 10 minutes, mix in the soy sauce and water. Cover the pot and set the heat to medium. Allow it to boil for about 30 minutes or until the meat is fork-tender. Add additional water incrementally if the pot is about to run dry. Once done, take out the chicken and set aside.
In a medium-sized pan add in the canola oil and set the heat to medium. Once the oil is hot, add the braised chicken and sear them on all sides. Remember do not overcrowd the meat. You may need to do it in batches.
Once done, transfer the meat back into the pot with the remaining sauce. Mix in the pineapple chunks and set heat to medium. Allow it to boil for 10 minutes uncovered until the sauce has reduced and is of the desired consistency.
Chicken adobo with pineapple is ready to be served!