Is the brown blood that flows throughout the menstrual period, and is not followed by red blood after five days, considered menstrual blood that necessitates abandoning prayer?

The ruling issued on this website states that any brownish discharge during the period of menstruation is considered menses, and thus, prayer and fasting are to be abstained from during its occurrence. If it is not within the period of menstruation, then its ruling is that of istihada (non-menstrual vaginal bleeding), and it is obligatory to perform ablution for each prayer after its time has begun, along with binding the area with a cloth.