Add punctuation: Less than a century after the destruction of Treasure Fleets the Portuguese appeared in the Indian Ocean in their relative small caravels
A: Less than a century after the destruction of Treasure Fleets the Portuguese appeared in the Indian Ocean in their relative small caravels.

Add punctuation: Firefox would not be Firefox if there would not be an option to play around with different content process values
A: Firefox would not be Firefox if there would not be an option to play around with different content process values.

Add punctuation: These items wereindispensable on plundering raids for self defence and provided protection in battle
A:
These items wereindispensable on plundering raids, for self- defence and provided protection in battle.